Note 18 - Restructuring (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Charges	$ 600	$ 990
Accounts Payable and Accrued Liabilities [Member]
Restructuring Reserve, Current			$ 100
Cost of Sales [Member]
Restructuring Charges	500
Selling, General and Administrative Expenses [Member]
Restructuring Charges	$ 100
Employee Severance [Member]
Restructuring Charges		500
Restructuring and Related Cost, Expected Cost Remaining		100
Demobilization Activities [Member]
Restructuring Charges		500
Demobilization Activities [Member] | Maximum [Member]
Restructuring and Related Cost, Expected Cost Remaining		$ 1,000