Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Policies)

v3.8.0.1
Summary of Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Principles of Consolidation
Principles of Consolidation 
The accompanying consolidated financial statements include the accounts of the Company, its subsidiaries in which the Company has a controlling financial interest and two investment funds formed to fund the purchase of solar energy systems, which are consolidated with the Company as variable interest entities (“VIE”). The Company uses a qualitative approach in assessing the consolidation requirement for VIEs. This approach focuses on determining whether the Company has the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance and whether the Company has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. For all periods presented, the Company has determined that it is the primary beneficiary in all of its operational VIEs. The Company evaluates its relationships with the VIEs on an ongoing basis to ensure that it continues to be the primary beneficiary. All significant intercompany accounts and transactions have been eliminated. Gains and losses from the translation of all foreign currency financial statements are recorded in accumulated other comprehensive loss, net, within stockholders’ equity. The Company prepares its financial statements in conformity with GAAP.
Use of Estimates
Use of Estimates 
GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant estimates and assumptions used in these consolidated financial statements relate to management’s estimates of final construction contract profit in accordance with accounting for long-term contracts, allowance for doubtful accounts, inventory reserves, realization of project development costs, fair value of derivative financial instruments, accounting for business acquisitions, stock-based awards, impairment of long-lived assets, income taxes, self insurance reserves and potential liability in conjunction with certain commitments and contingencies. Actual results could differ from those estimates.
The Company is self-insured for employee health insurance. The maximum exposure in fiscal year 2017 under the plan was $100 per covered participant, after which reinsurance takes effect. The liability for unpaid claims and associated expenses, including incurred but not reported claims, is determined by management and reflected in the Company’s consolidated balance sheets in accrued expenses and other current liabilities. The liability is calculated based on historical data, which considers both the frequency and settlement amount of claims. The Company’s estimated accrual for this liability could be different than its ultimate obligation if variables such as the frequency or amount of future claims differ significantly from management’s assumptions. 
Cash and Cash Equivalents
Cash and Cash Equivalents 
Cash and cash equivalents includes cash on deposit, overnight repurchase agreements and amounts invested in highly liquid money market funds. Cash equivalents consist of short term investments with original maturities of three months or less. The Company maintains accounts with financial institutions and the balances in such accounts, at times, exceed federally insured limits. This credit risk is divided among a number of financial institutions that management believes to be of high quality. The carrying amount of cash and cash equivalents approximates its fair value measured using level 1 inputs per the fair value hierarchy as defined in Note 16.
Restricted Cash
Restricted Cash 
Restricted cash consists of cash and cash equivalents held in an escrow account in association with construction draws for energy savings performance contracts (“ESPC”), construction of energy assets, operations and maintenance (“O&M”) reserve accounts and cash collateralized letters of credit as well as cash required under term loans to be maintained in debt service reserve accounts until all obligations have been indefeasibly paid in full. These accounts are primarily invested in highly liquid money market funds. The carrying amount of the cash and cash equivalents in these accounts approximates its fair value measured using level one inputs per the fair value hierarchy as defined in Note 16. Restricted cash also includes funds held for clients, which represent assets that, based upon the Company’s intent, are restricted for use solely for the purposes of satisfying the obligations to remit funds to third parties, primarily utility service providers, relating to the Company’s enterprise energy management services.
Accounts Receivable
Accounts Receivable 
Accounts receivable are stated at the amount management expects to collect from outstanding balances. An allowance for doubtful accounts is provided for those accounts receivable considered to be uncollectible based upon historical experience and management’s evaluation of outstanding accounts receivable. Bad debts are written off against the allowance when identified.
Accounts Receivable Retainage
Accounts Receivable Retainage 
Accounts receivable retainage represents amounts due from customers, but where payments are withheld contractually until certain construction milestones are met. Amounts retained typically range from 5% to 10% of the total invoice. The Company classifies as a current asset those retainages that are expected to be billed in the next twelve months.
Inventory
 Inventory 
Inventories, which consist primarily of PV solar panels, batteries and related accessories, are stated at the lower of cost (“first-in, first-out” method) or net realizable value (determined as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation). Provisions have been made to reduce the carrying value of inventory to the net realizable value.
Prepaid Expenses
Prepaid Expenses 
Prepaid expenses consist primarily of short-term prepaid expenditures that will amortize within one year. 
Federal ESPC Receivable
Federal ESPC Receivable 
Federal ESPC receivable represents the amount to be paid by various federal government agencies for work performed and earned by the Company under specific ESPCs. The Company assigns certain of its rights to receive those payments to third-party investors that provide construction and permanent financing for such contracts. Upon completion and acceptance of the project by the government, typically within 24 months of construction commencement, the assigned ESPC receivable from the government and corresponding ESPC liability are eliminated from the Company’s consolidated financial statements. 
Project Development Costs
Project Development Costs 
The Company capitalizes as project development costs only those costs incurred in connection with the development of energy projects, primarily direct labor, interest costs, outside contractor services, consulting fees, legal fees and travel, if incurred after a point in time where the realization of related revenue becomes probable. Project development costs incurred prior to the probable realization of revenue are expensed as incurred. The Company classifies as a current asset those project development efforts that are expected to proceed to construction activity in the twelve months that follow. The Company periodically reviews these balances and writes off any amounts where the realization of the related revenue is no longer probabl
Property and Equipment
Property and Equipment 
Property and equipment consists primarily of office and computer equipment, and is recorded at cost. Major additions and improvements are capitalized as additions to the property and equipment accounts, while replacements, maintenance and repairs that do not improve or extend the life of the respective assets, are expensed as incurred. Depreciation and amortization of property and equipment are computed on a straight-line basis over the following estimated useful lives:
Asset Classification
 
Estimated Useful Life
Furniture and office equipment
 
Five years
Computer equipment and software costs
 
Three to five years
Leasehold improvements
 
Lesser of term of lease or five years
Automobiles
 
Five years
Land
 
Unlimited

Gains or losses on disposal of property and equipment are reflected in selling, general and administrative expenses in the consolidated statements of income (loss).
Energy Assets
Energy Assets 
Energy assets consist of costs of materials, direct labor, interest costs, outside contract services, deposits and project development costs incurred in connection with the construction of small-scale renewable energy plants that the Company owns. These amounts are capitalized and amortized to cost of revenues in the Company’s consolidated statements of income (loss) on a straight line basis over the lives of the related assets or the terms of the related contracts.
The Company capitalizes interest costs relating to construction financing during the period of construction. Capitalized interest is included in energy assets, net, in the Company’s consolidated balance sheets. Capitalized interest is amortized to cost of revenues in the Company’s consolidated statements of income (loss) on a straight line basis over the useful life of the associated energy asset. The amount of interest capitalized for the years ended December 31, 2017, 2016 and 2015 was $4,256, $1,253 and $941, respectively.
Routine maintenance costs are expensed in the current year’s consolidated statements of income (loss) to the extent that they do not extend the life of the asset. Major maintenance, upgrades and overhauls are required for certain components of the Company’s assets. In these instances, the costs associated with these upgrades are capitalized and are depreciated over the shorter of the remaining life of the asset or the period until the next required major maintenance or overhaul.
The Company evaluates its long-lived assets for impairment as events or changes in circumstances indicate the carrying value of these assets may not be fully recoverable. Examples of such triggering events applicable to the Company’s assets include a significant decrease in the market price of a long-lived asset or asset group or a current-period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset or asset group.
The Company evaluates recoverability of long-lived assets to be held and used by estimating the undiscounted future cash flows before interest associated with the expected uses and eventual disposition of those assets. When these comparisons indicate that the carrying value of those assets is greater than the undiscounted cash flows, the Company recognizes an impairment loss for the amount that the carrying value exceeds the fair value.
From time to time, the Company has applied for and received cash grant awards from the U.S. Treasury Department (the “Treasury”) under Section 1603 of the American Recovery and Reinvestment Act of 2009 (the “Act”). The Act authorized the Treasury to make payments to eligible persons who place in service qualifying renewable energy projects. The grants are paid in lieu of investment tax credits. All of the cash proceeds from the grants were used and recorded as a reduction in the cost basis of the applicable energy assets. If the Company disposes of the property, or the property ceases to qualify as specified energy property, within five years from the date the property is placed in service, then a prorated portion of the Section 1603 payment must be repaid.
The Company did not receive any Section 1603 grants during the years ended December 31, 2017, 2016 and 2015. No further Section 1603 grant payments are expected to be received as the program has expired.
For tax purposes, the Section 1603 payments are not included in federal and certain state taxable income and the basis of the property is reduced by 50% of the payment received. Deferred grant income of $7,188 and $7,739 in the accompanying consolidated balance sheets at December 31, 2017 and 2016, respectively, represents the benefit of the basis difference to be amortized to income tax expense over the life of the related property.
The Company has historically received cash rebates from utility companies, which were accounted for as reductions in the book value of the related energy assets. The rebates were one-time payments based on the cost and efficiency of the installed units, and are earned upon installation and inspection by the utility. The payments are not related to, or subject to adjustment based on, future operating performance. The rebates were payable from the utility to the Company and are applied against the cost of construction, thereby reducing the book value of the corresponding energy assets and have been treated as an investing activity in the accompanying consolidated statements of cash flows.
Deferred Financing Fees
Deferred Financing Fees 
Deferred financing fees relate to the external costs incurred to obtain financing for the Company. Deferred financing fees are amortized over the respective term of the financing using the effective interest method, with the exception of the Company’s revolving credit facility and construction loans, as discussed in Note 7, for which deferred financing fees are amortized on a straight line basis over the term of the agreement. Deferred financing fees are presented on the consolidated balance sheets as a reduction to long-term debt and capital lease liabilities.
Goodwill and Intangible Assets
Goodwill and Intangible Assets
The Company has classified as goodwill the amounts paid in excess of fair value of the net assets (including tax attributes) of companies acquired in purchase transactions. The Company has recorded intangible assets related to customer contracts, customer relationships, non-compete agreements, trade names and technology, each with defined useful lives. The Company assesses the impairment of goodwill and intangible assets that have indefinite lives on an annual basis (December 31st) and whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable.

 Goodwill is reviewed for impairment annually and whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. The process of evaluating the potential impairment of goodwill requires significant judgment. The Company regularly monitors current business conditions and other factors including, but not limited to, adverse industry or economic trends, restructuring actions and projections of future results. The Company estimates the reporting units fair value and compares it with the carrying value of the reporting unit, including goodwill. If the fair value is greater than the carrying value of its reporting unit, no impairment is recorded. Fair value is determined using both an income approach and a market approach. The estimates and assumptions used in the Company’s calculations include revenue growth rates, expense growth rates, expected capital expenditures to determine projected cash flows, expected tax rates and an estimated discount rate to determine present value of expected cash flows. These estimates are based on historical experiences, the Company’s projections of future operating activity and its weighted-average cost of capital. If the fair value is less than the carrying value, an impairment loss is recognized for the amount that the carrying amount of a reporting unit, including goodwill, exceeds its fair value, limited to the total amount of goodwill allocated to that reporting unit. The impairment charge would be recorded to earnings in the consolidated statements of income (loss). Judgment is required in determining whether an event has occurred that may impair the value of goodwill or identifiable intangible assets. 
Acquired intangible assets other than goodwill that are subject to amortization include customer contracts and customer relationships, as well as software/technology, trade names and non-compete agreements. The intangible assets are amortized over periods ranging from one to fifteen years from their respective acquisition dates. The Company evaluates its intangible assets for impairment consistent with, and part of, their long-lived assets evaluation, as discussed in Energy Assets above.
See Notes 3 and 4 for additional disclosures.
Acquired Intangible Assets
Acquired intangible assets other than goodwill that are subject to amortization include customer contracts and customer relationships, as well as software/technology, trade names and non-compete agreements. The intangible assets are amortized over periods ranging from one to fifteen years from their respective acquisition dates. The Company evaluates its intangible assets for impairment consistent with, and part of, their long-lived assets evaluation, as discussed in Energy Assets above.
See Notes 3 and 4 for additional disclosures.
Other Assets
Other Assets 
Other assets consist primarily of notes and contracts receivable due to the Company from various customers and non-current restricted cash. Other assets also include the non-current portion of project development costs, accounts receivable retainages, sale-leaseback deferred loss and deferred contract costs. Other assets also include the fair value of derivatives.
Asset Retirement Obligations
Asset Retirement Obligations
The Company recognizes a liability for the fair value of required asset retirement obligations (“AROs”) when such obligations are incurred. The liability is estimated on a number of assumptions requiring management’s judgment, including equipment removal costs, site restoration costs, salvage costs, cost inflation rates and discount rates and is credited to its projected future value over time. The capitalized asset is depreciated using the convention of depreciation of plant assets. Upon satisfaction of the ARO conditions, any difference between the recorded ARO liability and the actual retirement cost incurred is recognized as an operating gain or loss in the consolidated statements of income (loss).
Federal ESPC Liabilities
Federal ESPC Liabilities
Federal ESPC liabilities represent the advances received from third-party investors under agreements to finance certain ESPC projects with various federal government agencies. Upon completion and acceptance of the project by the government, typically within 24 months of construction commencement, the ESPC receivable from the government and corresponding ESPC liability is eliminated from the Company’s consolidated balance sheet. Until recourse to the Company ceases for the ESPC receivables transferred to the investor, upon final acceptance of the work by the government customer, the Company remains the primary obligor for financing received.
Sale-Leaseback
Sale-Leaseback
During the first quarter of 2015, the Company entered into an agreement with an investor which gives the Company the option to sell and contemporaneously lease back solar photovoltaic (“solar PV”) projects. In September 2016, the Company amended its agreement with the investor whereas the investor has committed up to a maximum combined funding amount of $100,000 through June 30, 2017 on certain projects. In May 2017, the Company amended its agreement with the investor to extend the end date of the agreement to June 30, 2018. Additionally, the Company sold and contemporaneously leased back one solar PV project to a separate investor, not a party to the master lease agreement, under a new agreement during the year ended December 31, 2017. See below for a summary of solar PV project sales by fiscal year:

Year Ended
 
# Solar PV Projects Sold (actual #’s)
 
Sale Price
 
Deferred Gain Recorded
 
Deferred Loss Recorded
 
Capital Lease Asset/Liability Recorded
 
Initial Lease Term (years)
 
Minimum Lease Payment
 
Maximum Lease Payment
Year-ended December 31, 2015
 
3
 
$
12,506

 
$
933

 
$
924

 
$
6,810

 
20
 
$
7

 
$
348

Year-ended December 31, 2016
 
6
 
$
17,045

 
$
906

 
$
145

 
$
8,830

 
20-25
 
$
2

 
$
397

Year-ended December 31, 2017
 
13
 
$
51,204

 
$
4,625

 
$
1,204

 
$
22,934

 
10-20
 
$
4

 
$
510


As part of the agreement, the Company is a party to a master lease agreement that provides for the sale of solar PV projects to a third-party investor and the simultaneous leaseback of the projects, which the Company then operates and maintains, recognizing revenue through the sale of the electricity and solar renewable energy credits generated by these projects. In sale-leaseback arrangements, the Company first determines whether the solar PV project under the sale-leaseback arrangement is “integral equipment.” A solar PV project is determined to be integral equipment when the cost to remove the project from its existing location, including the shipping and reinstallation costs of the solar PV project at the new site, including any diminution in fair value, exceeds 10% of the fair value of the solar PV project at the time of its original installation. When the leaseback arrangement expires, the Company has the option to purchase the solar PV project for the then fair market value or, in certain circumstances, renew the lease for an extended term. All solar PV projects sold to date under the sale-leaseback program have been determined by the Company not to be integral equipment as the cost to remove the project from its existing location would not exceed 10% of its original fair value.
For solar PV projects that the Company has determined not to be integral equipment, the Company then determines if the leaseback should be classified as a capital lease or an operating lease. All solar PV projects sold to date under the sale-leaseback program have been determined by the Company to be capital leases. For leasebacks classified as capital leases, the Company initially records a capital lease asset and capital lease obligation in its consolidated balance sheet equal to the lower of the present value of the Company’s future minimum leaseback payments or the fair value of the solar PV project. For capital leasebacks, the Company defers any gain or loss, representing the excess or shortfall of cash received from the investor compared to the net book value of the asset in the Company’s consolidated balance sheet at the time of the sale. The Company records the long term portion of any deferred gain or loss in other liabilities and other assets, respectively, and the current portion of any deferred gain and loss in accrued expenses and other current liabilities and prepaid expenses and other current assets, respectively, in its consolidated balance sheet and amortizes the deferred amounts over the lease term in cost of revenues in its consolidated statements of income (loss).
Other Liabilities
Other Liabilities 
Other liabilities consist primarily of deferred revenue related to multi-year operation and maintenance contracts which expire at various dates through 2033. Other liabilities also include the fair value of derivatives and the long term portion of sale-leaseback deferred gains. See Note 17 for additional disclosures.
Revenue Recognition
Revenue Recognition 
The Company derives revenues from energy efficiency and renewable energy products and services. Energy efficiency products and services include the design, engineering, and installation of equipment and other measures to improve the efficiency, and control the operation, of a facility’s energy infrastructure. Renewable energy products and services include the construction of small-scale plants that produce electricity, gas, heat or cooling from renewable sources of energy, the sale of such electricity, gas, heat or cooling from plants that the Company owns, and the sale and installation of solar energy products and systems. 
Revenue from the installation or construction of projects is recognized on a percentage-of-completion basis. The percentage-of-completion for each project is determined on an actual cost-to-estimated final cost basis. Maintenance revenue is recognized as related services are performed. In accordance with industry practice, the Company includes in current assets and liabilities the amounts of receivables related to construction projects realizable and payable over a period in excess of one year. The revenue associated with contract change orders is recognized only when the authorization for the change order has been properly executed and the work has been performed. 
When the estimate on a contract indicates a loss, or claims against costs incurred reduce the likelihood of recoverability of such costs, the Company records the entire expected loss immediately, regardless of the percentage of completion. 
Billings in excess of cost and estimated earnings represents advanced billings on certain construction contracts. Costs and estimated earnings in excess of billings represent certain amounts under customer contracts that were earned and billable but not invoiced. 
The Company sells certain products and services in bundled arrangements, where multiple products and/or services are involved. The Company divides bundled arrangements into separate deliverables and revenue is allocated to each deliverable based on the relative selling price. The relative selling price is determined using third-party evidence or management’s best estimate of selling price.
The Company recognizes revenues from the sale and delivery of products, including the output from renewable energy plants, when produced and delivered to the customer, in accordance with specific contract terms, provided that persuasive evidence of an arrangement exists, the Company’s price to the customer is fixed or determinable and collectability is reasonably assured. The Company has agreements with third parties to sell power generated by certain of their energy assets under long term power purchase agreements. The Company has determined that certain of their power purchase agreements contain a lease component. The Company recognized $3,409, $3,162 and $2,198 of operating lease revenue under these agreements during the years ended December 31, 2017, 2016 and 2015, respectively.
 The Company recognizes revenues from O&M contracts, consulting services and enterprise energy management services as the related services are performed.
 For a limited number of contracts under which the Company receives additional revenue based on a share of energy savings, such additional revenue is recognized as energy savings are generated.
Cost of Revenue
Cost of Revenues
Cost of revenues include the cost of labor, materials, equipment, subcontracting and outside engineering that are required for the development and installation of projects, as well as preconstruction costs, sales incentives, associated travel, inventory obsolescence charges, amortization of intangible assets related to customer contracts, and, if applicable, costs of procuring financing. A majority of the Company’s contracts have fixed price terms; however, in some cases the Company negotiates protections, such as a cost-plus structure, to mitigate the risk of rising prices for materials, services and equipment. 
Cost of revenues also include the costs of maintaining and operating the small-scale renewable energy plants that the Company owns, including the cost of fuel (if any) and depreciation charges. 
Income Taxes
Income Taxes 
The Company provides for income taxes based on the liability method. The Company provides for deferred income taxes based on the expected future tax consequences of differences between the financial statement basis and the tax basis of assets and liabilities calculated using the enacted tax rates in effect for the year in which the differences are expected to be reflected in the tax return. 
The Company accounts for uncertain tax positions using a “more-likely-than-not” threshold for recognizing and resolving uncertain tax positions. The evaluation of uncertain tax positions is based on factors that include, but are not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to audit, new audit activity and changes in facts or circumstances related to a tax position. The Company evaluates uncertain tax positions on a quarterly basis and adjusts the level of the liability to reflect any subsequent changes in the relevant facts surrounding the uncertain positions.
The Company’s liabilities for uncertain tax positions can be relieved only if the contingency becomes legally extinguished through either payment to the taxing authority or the expiration of the statute of limitations, the recognition of the benefits associated with the position meet the “more-likely-than-not” threshold or the liability becomes effectively settled through the examination process.
The Company considers matters to be effectively settled once the taxing authority has completed all of its required or expected examination procedures, including all appeals and administrative reviews; the Company has no plans to appeal or litigate any aspect of the tax position; and the Company believes that it is highly unlikely that the taxing authority would examine or re-examine the related tax position. The Company also accrues for potential interest and penalties, related to unrecognized tax benefits in income tax expense.
The Company has presented all deferred tax assets and liabilities as noncurrent on its consolidated balance sheet as of December 31, 2017 and 2016, respectively.
See Note 8 for additional information on the Company’s income taxes. 
Foreign Currency
Foreign Currency 
The local currency of the Company’s foreign operations is considered the functional currency of such operations. All assets and liabilities of the Company’s foreign operations are translated into U.S. dollars at year-end exchange rates. Income and expense items are translated at average exchange rates prevailing during the year. Translation adjustments are accumulated as a separate component of stockholders’ equity. Foreign currency translation gains and losses are reported in the consolidated statements of comprehensive income (loss). Foreign currency transaction gains and losses are reported in the consolidated statements of income (loss). 
Financial Instruments
Financial Instruments 
Financial instruments consist of cash and cash equivalents, restricted cash, accounts and notes receivable, long-term contract receivables, accounts payable, accrued expenses, capital lease assets and liabilities, short- and long-term borrowings and interest rate swaps. Because of their short maturity, the carrying amounts of cash and cash equivalents, restricted cash, accounts and notes receivable, accounts payable, accrued expenses and short-term borrowings approximate fair value.
The Company accounts for its interest rate swaps as derivative financial instruments in accordance with the related guidance. Under this guidance, derivatives are carried on the Company’s consolidated balance sheets at fair value. The fair value of the Company’s interest rate swaps are determined based on observable market data in combination with expected cash flows for each instrument.
See below for fair value measurements of long-term debt. See Note 16 for fair value measurement of interest rate swaps.
Share-Based Compensation Expense
Stock-Based Compensation Expense 
Stock-based compensation expense results from the issuance of shares of restricted common stock and grants of stock options to employees, directors, outside consultants and others. The Company recognizes the costs associated with restricted stock and option grants using the fair value recognition provisions of accounting standards codification (“ASC”) 718, Compensation - Stock Compensation (“ASC 718”) on a straight-line basis over the vesting period of the awards. Certain option grants have performance conditions that must be achieved prior to vesting and are expensed based on the expected achievement at each reporting period. Stock-based compensation expense is also recognized in association with employee stock purchases related to the Company’s employee stock purchase plan.
Stock-based compensation expense is recognized based on the grant-date fair value. The Company estimates the fair value of the stock-based awards, including stock options, using the Black-Scholes option-pricing model. Determining the fair value of stock-based awards requires the use of highly subjective assumptions, including the fair value of the common stock underlying the award, the expected term of the award and expected stock price volatility. 
The assumptions used in determining the fair value of stock-based awards represent management’s estimates, which involve inherent uncertainties and the application of management judgment. As a result, if factors change, and different assumptions are employed, the stock-based compensation could be materially different in the future. The risk-free interest rates are based on the U.S. Treasury yield curve in effect at the time of grant, with maturities approximating the expected life of the stock options.
The Company has no history of paying dividends. Additionally, as of each of the grant dates, there was no expectation that the Company would pay dividends over the expected life of the options. The expected life of the awards is estimated using historical data and management’s expectations. Beginning in the year ended December 31, 2016, the Company uses historical volatility as the expected volatility assumption required in the Black-Scholes model. Prior to the year ended December 31, 2016, because there was no public market for the Company’s common stock prior to the Company’s initial public offering, management lacked company-specific historical and implied volatility information. Therefore, estimates of expected stock volatility were based on that of publicly traded peer companies.
The Company is required to recognize compensation expense for only the portion of options that are expected to vest. If there are any modifications or cancellations of the underlying invested securities or the terms of the stock option, it may be necessary to accelerate, increase or cancel any remaining unamortized stock-based compensation expense. As a result of the adoption of ASU-2016-09, no significant changes were made to the Company’s accounting for forfeitures. After this adoption the Company recorded a $4,000 deferred tax asset and corresponding credit to retained earnings for excess tax benefits that had not previously been recognized because the related tax deductions had not reduced taxes payable.
The Company also accounts for equity instruments issued to non-employee directors and consultants at fair value. All transactions in which goods or services are the consideration received for the issuance of equity instruments are accounted for based on the fair value of the consideration received or the fair value of the equity instrument issued, whichever is more reliably measurable. The measurement date of the fair value of the equity instrument issued is the date on which the counterparty’s performance is complete.
Fair Value Measurements
Fair Value Measurements 
The Company follows the guidance related to fair value measurements for all of its non-financial assets and non-financial liabilities, except for those recognized at fair value in the financial statements at least annually. These assets include goodwill and long-lived assets measured at fair value for impairment assessments, and non-financial assets and liabilities initially measured at fair value in a business combination.
The Company’s financial instruments include cash and cash equivalents, restricted cash, accounts and notes receivable, long-term contract receivables, interest rate swaps, accounts payable, accrued expenses, capital lease assets and liabilities and short-term and long-term borrowings. Because of their short maturity, the carrying amounts of cash and cash equivalents, restricted cash, accounts and notes receivable, accounts payable, accrued expenses and short-term borrowings approximate fair value. The carrying value of long-term variable-rate debt approximates fair value. As of December 31, 2017, the carrying value of the Company’s long-term debt exceeds its fair value of $160,108 by approximately $490. Fair value of the Company’s debt is based on quoted market prices or on rates available to the Company for debt with similar terms and maturities, which are level two inputs of the fair value hierarchy, as defined in Note 16.
The Company accounts for its interest rate swaps as derivative financial instruments in accordance with the related guidance. Under this guidance, derivatives are carried on the Company’s consolidated balance sheets at fair value. The fair value of the Company’s interest rate swaps are determined based on observable market data in combination with expected cash flows for each instrument.
See Note 16 for additional information related to fair value measurements.
FAIR VALUE MEASUREMENT
The Company recognizes its financial assets and liabilities at fair value on a recurring basis (at least annually). Fair value is defined as the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Three levels of inputs that may be used to measure fair value are as follows:
Level 1:  Inputs are based upon unadjusted quoted prices for identical instruments traded in active markets. 
Level 2:  Inputs are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. 
Level 3:  Inputs are generally unobservable and typically reflect management’s estimates of assumptions that market participants would use in pricing the asset or liability. The fair values are therefore determined using model-based techniques that include option pricing models, discounted cash flow models, and similar techniques. 
Derivative Financial Instruments
Derivative Financial Instruments  
In the normal course of business, the Company utilizes derivatives contracts as part of its risk management strategy to manage exposure to market fluctuations in interest rates. These instruments are subject to various credit and market risks. Controls and monitoring procedures for these instruments have been established and are routinely reevaluated. Credit risk represents the potential loss that may occur because a party to a transaction fails to perform according to the terms of the contract. The measure of credit exposure is the replacement cost of contracts with a positive fair value. The Company seeks to manage credit risk by entering into financial instrument transactions only through counterparties that the Company believes to be creditworthy.
Market risk represents the potential loss due to the decrease in the value of a financial instrument caused primarily by changes in interest rates. The Company seeks to manage market risk by establishing and monitoring limits on the types and degree of risk that may be undertaken. As a matter of policy, the Company does not use derivatives for speculative purposes. The Company considers the use of derivatives with all financing transactions to mitigate risk. 
The Company recognizes cash flows from derivative instruments as operating activities in the consolidated statements of cash flows. The effective portion of changes in fair value on interest rate swaps designated as cash flow hedges are recognized in the Company’s consolidated statements of comprehensive income (loss). The ineffective portion of changes in fair value on interest rate swaps designated as hedges and changes in fair value on interest rate swaps not designated as hedges are recognized in the Company’s consolidated statements of income (loss).
Earnings Per Share
Earnings Per Share
Basic earnings per share is calculated using the Company’s weighted-average outstanding common shares, including vested restricted shares. When the effects are not anti-dilutive, diluted earnings per share is calculated using the weighted-average outstanding common shares; the dilutive effect of convertible preferred stock, under the “if converted” method; and the treasury stock method with regard to warrants and stock options; all as determined under the treasury stock method.
Variable Interest Entities
Variable Interest Entities
Certain contracts are executed jointly through partnership and joint venture arrangements with unrelated third parties. The arrangements are often formed for the single business purpose of executing a specific project and allow the Company to share risks and/or secure specialty skills required for project execution.
        The Company evaluates each partnership and joint venture at inception to determine if it qualifies as a VIE under ASC 810, Consolidation. A variable interest entity is an entity used for business purposes that either (a) does not have equity investors with voting rights or (b) has equity investors who are not required to provide sufficient financial resources for the entity to support its activities without additional subordinated financial support. Upon the occurrence of certain events outlined in ASC 810, the Company reassesses its initial determination of whether the partnership or joint venture is a VIE.
        The Company also evaluates whether it is the primary beneficiary of each VIE and consolidates the VIE if the Company has both (a) the power to direct the economically significant activities of the entity and (b) the obligation to absorb losses of, or the right to receive benefits from, the entity that could potentially be significant to the VIE. The Company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining whether it qualifies as the primary beneficiary. The Company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. When the Company is determined to be the primary beneficiary, the VIE is consolidated. As required by ASC 810, management's assessment of whether the Company is the primary beneficiary of a VIE is continuously performed. See Note 9 for additional disclosures.
Redeemable Non-Controlling Interests
Redeemable Non-Controlling Interests
In September 2015, the Company formed an investment fund with a third party investor which granted the investor ownership interests in the net assets of certain of the Company’s renewable energy project subsidiaries. In June 2017, the Company formed a second investment fund with a third party investor which granted the investor ownership interests in the net assets of certain of the Company’s renewable energy project subsidiaries. The Company entered into these agreements in order to finance the costs of constructing energy assets which are under long-term customer contracts. The Company has determined that these entities qualify as VIEs and that it is the primary beneficiary in the operational partnerships for accounting purposes. Accordingly, the Company will consolidate the assets and liabilities and operating results of the entities in its consolidated financial statements. The Company will recognize the investors’ share of the net assets of the subsidiaries as redeemable non-controlling interests in its consolidated balance sheets.
The Company has determined that the provisions in the contractual arrangements represent substantive profit-sharing arrangements. The Company has further determined that the appropriate methodology for attributing income and loss to the redeemable non-controlling interests each period is a balance sheet approach referred to as the hypothetical liquidation at book value (“HLBV”) method. Under the HLBV method, the amounts of income and loss attributed to the redeemable non-controlling interests in the consolidated statements of income (loss) reflect changes in the amounts the investors would hypothetically receive at each balance sheet date under the liquidation provisions of the contractual agreements, assuming the net assets of this funding structure were liquidated at recorded amounts. The investors’ non-controlling interest in the results of operations of this funding structure is determined as the difference in the non-controlling interest’s claim under the HLBV method at the start and end of each reporting period, after taking into account any capital transactions, such as contributions or distributions, between the Company’s subsidiaries and the investors. The use of the HLBV methodology to allocate income to the redeemable non-controlling interest holders may create volatility in the Company’s consolidated statements of income (loss) as the application of HLBV can drive changes in net income available and loss attributable to the redeemable non-controlling interests from quarter to quarter.
The Company classified the non-controlling interests with redemption features that are not solely within the control of the Company outside of permanent equity on its consolidated balance sheets. The redeemable non-controlling interests will be reported using the greater of their carrying value at each reporting date as determined by the HLBV method or the estimated redemption values in each reporting period.
See Notes 9 and 10 for additional disclosures.
Recent Accounting Pronouncements
Recent Accounting Pronouncements
Revenue from Contracts with Customers
In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers, as amended (Topic 606) (commonly referred to as ASC 606), which will change the way the Company recognizes revenue and costs related to customer contracts and significantly expand the disclosure requirements for revenue arrangements. The new standard is effective for annual reporting periods beginning after December 15, 2017. The standard allows for two transition methods - retrospectively to each prior reporting period presented (full retrospective method) or retrospectively with the cumulative effect of initially applying the standard recognized at the date of initial adoption (modified retrospective method).
The Company adopted the requirements of the new standard, including additional accounting standard updates issued during 2016 which provide clarification and expanded guidance on ASU 2014-09 topics, on January 1, 2018 using the modified retrospective method, whereby ASC 606 would apply to all new contracts initiated on or after January 1, 2018. For existing contracts that have remaining obligations as of January 1, 2018, any difference between the recognition criteria in connection with the new standard and the Company’s current revenue recognition practices would be recognized using a cumulative effect adjustment to the opening balance of retained earnings. Accordingly, the Company has elected to retroactively adjust only those contracts that do not meet the definition of a complete contract at the date of the initial application. As ASC 606 supersedes substantially all existing revenue guidance affecting the Company under current GAAP, it will impact revenue and cost recognition across all of the Company’s business segments, as well as its business processes and information technology systems.
The Company commenced the evaluation of the impact of ASC 606 in mid-2016, by evaluating its impact on existing contracts for each of the lines of business at each of the business segments. With this baseline understanding, the Company developed a project plan to evaluate numerous contracts across business segments, develop processes and tools to dual report financial results under both current GAAP and ASC 606 and assess the internal control structure in order to adopt ASC 606 on January 1, 2018. The Company has substantially completed the evaluation and implementation of system updates and changes to internal controls over financial reporting to allow timely compilation of the information needed to account for transactions under this new guidance and to adjust the consolidated financial statements. The Company has periodically briefed the Audit Committee on progress made towards adoption.
During the fourth quarter of 2017 the Company finalized its assessments over the impact that these new standards will have on the Company’s consolidated results of operations, financial position and disclosures. In adopting the previously mentioned ASUs, the Company expects the following significant changes in accounting principles:
(i)
Timing of revenue recognition for uninstalled materials - The Company currently recognizes the majority of revenue from the installation or construction of projects using the percentage-of-completion method of accounting, whereby revenue is recognized as the Company progresses on the contract. The percentage-of-completion for each project is determined on an actual cost-to-estimated final cost basis. Under ASC 606, revenue will be recognized as the customer obtains control of the goods and services promised in the contract (i.e., performance obligations). The cost of uninstalled materials or equipment will generally be excluded from the Company’s measure of progress, unless specifically produced or manufactured for a project, because such costs are not considered to be a measure of progress, unless the materials or equipment are delivered and expected to be installed by the Company in 90 days or less.

(ii)
Deferral of incremental direct costs to obtaining a contract with a customer - The Company currently records certain incremental compensation (i.e., sales commissions) payable to its sales force as an expense when earned which is included in the measure of progress towards completion. Under ASC 606, the Company will continue to capitalize these costs and subsequently amortize the capitalized costs over a period of time that is consistent with the transfer of the related good or service to the customer. Capitalized costs, net of accumulated amortization, will be included in “Prepaid expenses and other current assets” and “Other assets”on its consolidated balance sheets. If the incremental cost incurred exceeds payments made, the accrued cost will be included in “Accrued expenses and other liabilities”.

(iii)
Timing of revenue recognition from renewable energy incentives - Under current accounting policies, the Company recognizes revenue for SRECs and other renewable energy incentives when generated if the Company has a signed contract to sell those SRECs or renewable energy incentives to a third party (thus making the sale price fixed and determinable). Under ASC 606, the Company will recognize SREC and other renewable energy incentive revenues when the rights are transferred to a third party, which can be up to six months after generation.

Revenue of approximately $9,100, that is reflected in the consolidated statement of income (loss) in 2017, will be recorded as a reduction in equity as an adjustment under the modified retrospective method. Additionally costs of approximately $2,700, that are reflected in the consolidate statement of income (loss) in 2017, will be recorded as an increase in equity in connection with the modified retrospective adjustment. In connection with the change in accounting treatment the Company estimates that it will record a net deferred tax asset of approximately $1,700. This is the result of timing differences in the recognition of revenue items and their associated costs for financial statement purposes versus the Tax Code. The cumulative impact of adopting the new accounting standard will result in a decrease in stockholders’ equity, net of tax, of approximately $4,700.

Intangibles-Goodwill and Other

In January 2017, the FASB issued ASU No. 2017-04, Intangibles-Goodwill and Other (Topic 350), which eliminates the requirement to compare the implied fair value of reporting unit goodwill with the carrying amount of that goodwill (commonly referred to as Step 2) from the goodwill impairment test. The new standard does not change how a goodwill impairment is identified. The Company will continue to perform quantitative and qualitative goodwill impairment test by comparing the fair value of each reporting unit to its carrying amount, but if the Company is required to recognize a goodwill impairment charge, under the new standard the amount of the charge will be calculated by subtracting the reporting unit’s fair value from its carrying amount. Under the prior standard, if the Company were required to recognize a goodwill impairment charge, Step 2 required to calculate the implied value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination and the amount of the charge was calculated by subtracting the reporting unit’s implied fair value of goodwill from its actual goodwill balance. The new standard is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted, and should be applied prospectively from the date of adoption. The Company elected to adopt the new standard for future goodwill impairment tests at the beginning of the fourth quarter of 2017, because it significantly simplifies the evaluation of goodwill for impairment. See Note 3 to the consolidated financial statements for further details.

Derivatives and Hedging

In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, which improves the financial reporting of hedging relationships to better portray the economic results of an entity's risk management activities in its financial statements. ASU 2017-12 is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those annual reporting periods. Early adoption is permitted. The Company is currently evaluating the impact ASU 2017-12 will have on its consolidated financial statements.

Leases
In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The guidance in this ASU supersedes the leasing guidance in Topic 840, Leases. Under the new guidance, lessees are required to recognize lease assets and lease liabilities on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is currently evaluating the impact of adopting the new standard on its consolidated financial statements.
Stock Based Compensation Expense
In May 2017, the FASB issued ASU No. 2017-09, Compensation - Stock Compensation (Topic 718): Scope of Modification Accounting. This new guidance amends the scope of modification accounting for share-based payment awards. ASU 2017-09 provide guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under ASC 718. ASU 2017-09 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the impact of ASU 2017-09, but does not expect that the adoption of this guidance will have a significant impact on its consolidated financial statements.
In March 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation-Improvements to Employee Share-Based Payment Accounting. The guidance in this ASU involves several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the consolidated statement of cash flows. Under ASU 2016-09, income tax benefits and deficiencies are to be recognized as income tax expense or benefit in the consolidated statement of income (loss) and the tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. Additionally, under ASU 2016-09, excess tax benefits should be classified along with other income tax cash flows as an operating activity. The Company adopted this guidance in the first quarter of fiscal 2017, and as a result of this adoption recorded a $4,000 deferred tax asset and corresponding credit to retained earnings for excess tax benefits that had not previously been recognized because the related tax deductions had not reduced taxes payable. The Company has not changed its accounting policy in regards to forfeitures as a result of the adoption of this guidance. The Company's adoption of the new standard also resulted in the prospective classification of excess tax benefits as cash flows from operating activities in the same manner as other cash flows related to income taxes within the consolidated statements of cash flows. Based on the prospective method of adoption chosen, the classification of excess tax benefits within the consolidated statements of cash flows for prior periods presented has not been adjusted to reflect the change.
Consolidated Statements of Cash Flow
In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 eliminates diversity in practice in how certain cash receipts and cash payments are presented and classified in the consolidated statements of cash flows. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the impact of ASU 2016-15, but does not expect that the adoption of this guidance will have a significant impact on its consolidated financial statements.
In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 23), Restricted Cash. ASU 2016-18 requires restricted cash and cash equivalents to be included with cash and cash equivalents on the statement of cash flows. ASU 2016-18 is effective for annual reporting periods beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted. The guidance should be applied using a retrospective transition method for each period presented. The Company expects to adopt this guidance when effective. The Company is currently evaluating the impact ASU 2016-18 will have on its consolidated financial statements, and expects the ASU will modify the presentation of the consolidated statements of cash flows, but will not have a material impact on the consolidated statements of income, consolidated statements of comprehensive income (loss), consolidated statement of changes in redeemable non-controlling interests and stockholders’ equity and the consolidated balance sheets.