Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Intangible Assets (Details)

v2.4.0.6
Goodwill and Intangible Assets - Intangible Assets (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
entity
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Jul. 31, 2012
Finite-Lived Intangible Assets [Line Items]          
Number of businesses acquired 1        
Intangible Assets, Net [Roll Forward]          
December 31, 2011     $ 12,727,528    
Acquisitions         1,712,021
2012 Amortization (1,113,033) (501,000) (4,084,055) (501,000)  
Foreign Currency Translation     34,752    
September 30, 2012 10,390,246   10,390,246    
Customer contracts [Member] | Energy efficiency expenses [Member]
          
Intangible Assets, Net [Roll Forward]          
2012 Amortization (400,084)   (2,033,797)    
Customer relationships, non-compete agreements, technology, and trade name [Member] | General, administrative and other expenses [Member]
          
Intangible Assets, Net [Roll Forward]          
2012 Amortization (712,949)   (2,050,258)    
Other U.S Regions [Member] | Customer contracts [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     1,060,433    
2012 Amortization     (1,060,433)    
September 30, 2012 0   0    
Other U.S Regions [Member] | Customer relationships [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     3,240,593    
2012 Amortization     (826,219)    
September 30, 2012 2,414,374   2,414,374    
Other U.S Regions [Member] | Non-compete agreements [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     1,393,575    
2012 Amortization     (412,755)    
September 30, 2012 980,820   980,820    
Other U.S Regions [Member] | Technology [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     200,582    
2012 Amortization     (38,940)    
September 30, 2012 161,642   161,642    
Canada [Member] | Customer contracts [Member]
          
Intangible Assets, Net [Roll Forward]          
2012 Amortization     (41,554)    
Foreign Currency Translation     10,001    
September 30, 2012 477,965   477,965    
Canada [Member] | Customer relationships [Member]
          
Intangible Assets, Net [Roll Forward]          
2012 Amortization     (2,654)    
Foreign Currency Translation     3,310    
September 30, 2012 158,198   158,198    
Canada [Member] | Non-compete agreements [Member]
          
Intangible Assets, Net [Roll Forward]          
2012 Amortization     (9,811)    
Foreign Currency Translation     5,991    
September 30, 2012 286,336   286,336    
Canada [Member] | Technology [Member]
          
Intangible Assets, Net [Roll Forward]          
2012 Amortization     (29,615)    
Foreign Currency Translation     13,835    
September 30, 2012 661,251   661,251    
Canada [Member] | Trade names [Member]
          
Intangible Assets, Net [Roll Forward]          
2012 Amortization     (2,214)    
Foreign Currency Translation     1,615    
September 30, 2012 77,175   77,175    
All Other [Member] | Customer contracts [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     2,551,124    
2012 Amortization     (931,810)    
September 30, 2012 1,619,314   1,619,314    
All Other [Member] | Customer relationships [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     2,073,478    
2012 Amortization     (117,858)    
September 30, 2012 1,955,620   1,955,620    
All Other [Member] | Non-compete agreements [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     398,222    
2012 Amortization     (74,667)    
September 30, 2012 323,555   323,555    
All Other [Member] | Technology [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     1,386,506    
2012 Amortization     (410,053)    
September 30, 2012 976,453   976,453    
All Other [Member] | Trade names [Member]
          
Intangible Assets, Net [Roll Forward]          
December 31, 2011     423,015    
2012 Amortization     (125,472)    
September 30, 2012 297,543   297,543    
FAME [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Number of businesses acquired     1    
FAME [Member] | Canada [Member] | Customer contracts [Member]
          
Intangible Assets, Net [Roll Forward]          
Acquisitions         509,518
FAME [Member] | Canada [Member] | Customer relationships [Member]
          
Intangible Assets, Net [Roll Forward]          
Acquisitions         157,542
FAME [Member] | Canada [Member] | Non-compete agreements [Member]
          
Intangible Assets, Net [Roll Forward]          
Acquisitions         290,156
FAME [Member] | Canada [Member] | Technology [Member]
          
Intangible Assets, Net [Roll Forward]          
Acquisitions         677,031
FAME [Member] | Canada [Member] | Trade names [Member]
          
Intangible Assets, Net [Roll Forward]          
Acquisitions         $ 77,774
Minimum [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     1 year    
Minimum [Member] | Customer contracts [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     1 year    
Minimum [Member] | Customer relationships, non-compete agreements, technology, and trade name [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     4 years    
Maximum [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     14 years    
Maximum [Member] | Customer contracts [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     5 years    
Maximum [Member] | Customer relationships, non-compete agreements, technology, and trade name [Member]
          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     14 years