Concentration of Risk and Enterprise Wide Disclosures (Tables)

9 Months Ended

Sep. 30, 2012

Accounts Receivable [Member]

Concentration Risk [Line Items]

Schedules of Concentration of Risk, by Risk Factor

The table below presents the concentrations of receivables (trade and retainage) at September 30, 2012 and December 31, 2011, respectively:

	September 30, 2012				December 31, 2011
Federal Government	$	6,181	16	%	$	5,958	22	%
State Governments	1,400		4	%	379		1	%
Local Governments	4,455		11	%	6,207		24	%
Private Companies	27,093		69	%	14,387		53	%
Total receivables	$	39,129	100	%	$	26,931	100	%

Contract Revenues [Member]

Concentration Risk [Line Items]

Schedules of Concentration of Risk, by Risk Factor

Additionally, the table below represents concentrations of revenue by type of customer for the three and nine months ended September 30, 2012 and 2011.

	Three months ended September 30,								Nine months ended September 30,
	2012		%		2011		%		2012		%		2011		%
Federal……..	$	17,408	23	%	$	24,175	44	%	$	42,336	22	%	$	91,377	45	%
State………..	11,623		15	%	9,559		18	%	28,637		15	%	41,631		20	%
Local……….	7,463		10	%	12,644		23	%	32,057		17	%	34,820		17	%
Private………	38,892		52	%	8,205		15	%	90,378		47	%	36,711		18	%
	$	75,386	100	%	$	54,583	100	%	$	193,408	100	%	$	204,539	100	%