Quarterly report pursuant to Section 13 or 15(d)

Business Acquisitions and Related Transactions - Business Acquisition (Details)

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Business Acquisitions and Related Transactions - Business Acquisition (Details) (USD $)
3 Months Ended 9 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Sep. 30, 2013
ESP [Member]
Sep. 30, 2013
Ennovate [Member]
Dec. 31, 2012
FAME [Member]
Business Acquisition [Line Items]                
Cash           $ 1,291,697 $ 0 $ 809,557
Accounts receivable and accounts receivable retainage           360,924 445,769 320,997
Costs and estimated earnings in excess of billings           546,608 110,987 0
Prepaid expenses and other current assets           0 1,710 107,715
Property and equipment and project assets           75,054 62,898 43,115
Goodwill 55,615,137   55,615,137   48,968,390 5,089,049 921,128 1,886,945
Intangible assets           3,087,509 610,000 2,099,990
Other assets           0 0 100
Accounts payable           (47,625) (313,976) (5,713)
Accrued liabilities           (606,938) 0 (617,731)
Billings in excess of cost and estimated earnings           0 (30,431) (158,025)
Other liabilities           (967,065) 0 0
Purchase price           8,829,213 1,808,085 4,486,950
Total, net of cash received 599,375 3,677,393 9,944,976 3,677,393   7,537,516 1,808,085 3,677,393
Total fair value of consideration           $ 8,829,213 $ 1,808,085 $ 4,486,950