Note 2 - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued expenses	$ 7,940	$ 5,536
Vacation	4,782	4,301
Accrued liability to MWL	4,284	466
Salaries and wages	2,644	1,204
Other	1,984	1,203
	$ 21,634	$ 12,710