Condensed Consolidated Balance Sheets [Parenthetical] (USD $)	Jun. 30, 2011	Dec. 31, 2010
Cash and cash equivalents	$ 493,559	$ 761,874
Allowance for doubtful accounts (in dollars)	65,000	59,000
Projects under construction	1,217,871	1,601,682
Due from related party (in dollars)	31,000	213,000
Trade payables	5,094,649	4,307,358
Line of credit	6,093,810	8,225,900
Debt discount, Notes payable - officers, Current (in dollars)	0	5,000
Debt discount, Notes payable - officers, subordinated, Noncurrent (in dollars)	0	0
Preferred Stock - no par value (in dollars per share)	$ 0	$ 0
Preferred Stock, shares authorized	2,000,000	2,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common stock - no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	5,000,000	5,000,000
Common stock, shares issued	3,209,975	3,209,475
Common stock, shares outstanding	3,137,848	3,137,348
Treasury stock, shares	72,127	72,127
Variable Interest Entity, Primary Beneficiary
Cash and cash equivalents	6,000	38,000
Projects under construction	652,000	587,000
Trade payables	28,000	58,000
Line of credit	$ 0	$ 700,000