Note 4 - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
US Government [Member]
Costs incurred on uncompleted Contracts	$ 365,420,922	$ 349,458,368
Estimated earnings	49,232,922	62,718,792
Sub-total	414,653,844	412,177,160
Less billings to date	367,009,811	353,601,903
Totals	47,644,033	58,575,257
Commercial [Member]
Costs incurred on uncompleted Contracts	131,723,458	123,078,356
Estimated earnings	51,232,036	49,539,299
Sub-total	182,955,494	172,617,655
Less billings to date	137,787,467	128,745,963
Totals	45,168,027	43,871,692
Costs incurred on uncompleted Contracts	497,144,380	472,536,724
Estimated earnings	100,464,958	112,258,091
Sub-total	597,609,338	584,794,815
Less billings to date	504,797,278	482,347,866
Totals	$ 92,812,060	$ 102,446,949