Consolidated Balance Sheets [Parenthetical] (USD $)	Dec. 31, 2011	Dec. 31, 2010
Cash and cash equivalents	$ 338,523	$ 761,874
Allowance for doubtful accounts	70,000	59,000
Prepaid expenses	1,345,223	582,025
Other current assets	427,471	430,042
Projects under construction	502,021	1,601,682
Due from related party	79,000	213,000
Trade payables	6,359,757	4,307,358
Line of credit	7,298,363	8,225,900
Notes Payable, Current	362,927	276,667
Debt discount, Notes payable - officers, subordinated, Noncurrent	0	5,000
Notes payable, net of current portion	3,932,032	2,611,127
Preferred Stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common stock, shares authorized (in shares)	5,000,000	5,000,000
Common stock, shares issued (in shares)	3,276,633	3,209,475
Common stock, shares outstanding (in shares)	3,137,348	2,808,720
Treasury stock, shares (in shares)	72,127	72,127
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents	11,000	38,000
Prepaid expenses	10,000	0
Other current assets	83,000	0
Projects under construction	0	587,000
Trade payables	0	58,000
Line of credit	0	700,000
Notes Payable, Current	91,000	0
Notes payable, net of current portion	$ 687,000	$ 0