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 6 Months Ended 12 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2012
FAME [Member]
Jun. 30, 2013
ESP [Member]
Jun. 30, 2013
Ennovate [Member]
Business Acquisition [Line Items]                
Cash           $ 809,557 $ 1,291,697 $ 0
Accounts receivable and accounts receivable retainage           320,997 360,924 445,769
Costs and estimated earnings in excess of billings           0 546,608 110,987
Prepaid expenses and other current assets           107,715 0 1,710
Property and equipment and project assets           43,115 75,054 62,898
Goodwill 55,239,777   55,239,777   48,968,390 1,886,945 5,089,049 921,128
Intangible assets           2,099,990 3,087,509 610,000
Other assets           100 0 0
Accounts payable           (5,713) (47,625) (313,976)
Accrued liabilities           (617,731) (606,938) 0
Billings in excess of cost and estimated earnings           (158,025) 0 (30,431)
Other liabilities           0 (967,065) 0
Purchase price           4,486,950 8,829,213 1,808,085
Total, net of cash received 7,537,516 0 9,345,601 0   3,677,393 7,537,516 1,808,085
Total fair value of consideration           $ 4,486,950 $ 8,829,213 $ 1,808,085