Note 4 - Costs and Estimated Earnings on Uncompleted Contracts - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
US Government [Member]
Costs incurred on uncompleted contracts	$ 318,013,719	$ 299,871,583
Estimated earnings	62,223,542	56,708,610
Sub-total	380,237,261	356,580,193
Less billings to date	328,958,180	313,441,471
Totals	51,279,081	43,138,722
Commercial [Member]
Costs incurred on uncompleted contracts	104,947,445	90,272,545
Estimated earnings	44,915,987	39,773,983
Sub-total	149,863,432	130,046,528
Less billings to date	111,057,919	94,324,761
Totals	38,805,513	35,721,767
Costs incurred on uncompleted contracts	422,961,164	390,144,128
Estimated earnings	107,139,529	96,482,593
Sub-total	530,100,693	486,626,721
Less billings to date	440,016,099	407,766,232
Totals	$ 90,084,594	$ 78,860,489