Note 16 - Employee Benefit Plans - Components of the Net Periodic Benefit Cost of the Defined Benefit Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Service cost
Interest cost	87	83	90
Expected return on plan assets
Amortization of prior service cost
Amortization of net losses	47	59	36
Net periodic benefit cost	$ 134	$ 142	$ 126