COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS (Tables)

3 Months Ended

Mar. 31, 2013

Costs and estimated earnings in excess of billings on uncompleted contracts consist of:

	March 31, 2013
	U.S
	Government	Commercial	Total

Costs incurred on uncompleted
contracts	$246,341,518	$46,580,985	$292,922,503
Estimated earnings	65,879,081	25,421,477	91,300,558
Subtotal	312,220,599	72,002,462	384,223,061
Less billings to date	227,019,725	47,501,933	274,521,658
Costs and estimated earnings
in excess of billings on
uncompleted contracts	$85,200,874	$24,500,529	$109,701,403

	December 31, 2012
	U.S.
	Government	Commercial	Total
Costs incurred on uncompleted
contracts	$214,888,101	$42,636,753	$257,524,854
Estimated earnings	85,320,636	23,782,285	109,102,921
Subtotal	300,208,737	66,419,038	366,627,775
Less billings to date	215,743,090	42,631,694	258,374,784
Costs and estimated earnings in excess of billings on uncompleted contracts	$84,465,647	$23,787,344	$108,252,991

The above amounts are included in the accompanying balance sheets under the following captions at March 31, 2013 and December 31, 2012:

	March 31, 2013	December 31, 2012
Costs and estimated earnings in excess of billings on
uncompleted contracts	$ 110,011,430	$ 108,909,844
Billings in excess of costs and estimated earnings on
uncompleted contracts	(310,027)	(656,853)

Totals	$ 109,701,403	$ 108,252,991