Note 12 - Significant Customers (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Accounts Receivable | Customer A
Concentration Risk, Percentage	14.00%
Accounts Receivable | Customer B
Concentration Risk, Percentage	14.00%
Accounts Receivable | Customer C
Concentration Risk, Percentage	13.00%
Accounts Receivable | Customer D
Concentration Risk, Percentage	13.00%
Accounts Receivable | Customer E
Concentration Risk, Percentage		23.00%
Accounts Receivable | Customer G
Concentration Risk, Percentage		12.00%
Costs and Estimated Earnings in Excess of Billings | Customer E
Concentration Risk, Percentage	41.00%	37.00%
Costs and Estimated Earnings in Excess of Billings | Customer F
Concentration Risk, Percentage	12.00%
Costs and Estimated Earnings in Excess of Billings | Customer H
Concentration Risk, Percentage		15.00%
Sales Revenue, Net | Customer Concentration Risk
Concentration Risk, Percentage	0.00%	0.00%