Note 11 - Major Customers (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 11 - Major Customers (Details) [Line Items]
Number of Large Customers Contributed to Revenue of Entity	4	4
Number of Large Customers Included in Accounts Receivable of Entity	3	3
Number of Large Commercial Customers Accounted for Major Share in Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts	4		4
U.S. Government [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	2.00%	2.00%	7.00%
U.S. Government [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	1.00%	1.00%
U.S. Government [Member] | Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	1.00%	1.00%
Customer A [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	22.00%	26.00%
Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	21.00%	28.00%
Customer A [Member] | Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	27.00%	40.00%
Customer B [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	22.00%	21.00%
Customer B [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	26.00%	24.00%
Customer B [Member] | Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	25.00%	17.00%
Customer C [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	19.00%	19.00%
Customer C [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	15.00%	20.00%
Customer C [Member] | Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	13.00%	16.00%
Customer D [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	11.00%	12.00%
Customer D [Member] | Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts [Member] | Customer Concentration Risk [Member]
Note 11 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	8.00%		10.00%