CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable, allowance	$ 1,489,462	$ 1,481,307
Current retentions receivable, allowance	534,128	531,203
Long-term retentions receivable, allowance	$ 1,179,317	$ 1,172,860
Series A preferred stock, par value per share	$ 0.0001	$ 0.0001
Series A preferred stock, shares authorized	20,000,000	200,000,000
Series A preferred stock, shares issued	0	0
Series A preferred stock, shares outstanding	0	0
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	19,995,701	19,995,701
Common stock, shares outstanding	19,995,701	19,995,701