Note 4 - Costs and Estimated Earnings on Uncompleted Contracts - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Costs incurred on uncompleted contracts	$ 406,092,652	$ 390,144,128
Estimated earnings	101,705,002	96,482,593
Sub-total	507,797,654	486,626,721
Less billings to date	425,004,742	407,766,232
Totals	82,792,912	78,860,489
US Government [Member]
Costs incurred on uncompleted contracts	308,735,093	299,871,583
Estimated earnings	59,792,771	56,708,610
Sub-total	368,527,864	356,580,193
Less billings to date	322,540,371	313,441,471
Totals	45,987,493	43,138,722
Commercial [Member]
Costs incurred on uncompleted contracts	97,357,559	90,272,545
Estimated earnings	41,912,231	39,773,983
Sub-total	139,269,790	130,046,528
Less billings to date	102,464,371	94,324,761
Totals	$ 36,805,419	$ 35,721,767