Ameresco, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Tables)

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Changes in Allowance for Doubtful Accounts

Changes in the allowance for doubtful accounts are as follows:



	Year Ended December 31,
	2014			2013			2012
Balance, beginning of period	$	1,519		$	1,174		$	1,135
Charges to costs and expenses	1,988			502			149
Account write-offs and other	(656		)	(157		)	(110		)
Balance, end of period	$	2,851		$	1,519		$	1,174

Estimated Useful Lives of Property and Equipment

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

Property and equipment consists of the following:



	December 31,
	2014			2013
Furniture and office equipment	$	5,055		$	5,002
Computer equipment and software costs	17,237			15,970
Leasehold improvements	2,707			2,560
Automobiles	1,099			1,055
Land	520			520
Property and equipment, gross	26,618			25,107
Less - accumulated depreciation	(19,246		)	(16,408		)
Property and equipment, net	$	7,372		$	8,699

Basic and Diluted Earnings Per Share Calculation, Numerator and Denominator

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.



	Year Ended December 31,
	2014		2013		2012
Net income	$	10,383	$	2,414	$	18,360
Basic weighted-average shares outstanding	46,161,846		45,560,078		44,649,275
Effect of dilutive securities:
Stock options	556,294		859,121		1,346,188
Diluted weighted-average shares outstanding	46,718,140		46,419,199		45,995,463