Note 8 - Employee Benefit Plans - Amounts Recognized in the Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current liabilities:
Accrued benefit liability	$ (420)	$ (402)
Non- current pension liability:
Accrued benefit liability	(44,491)	(46,513)
Accumulated other comprehensive loss	40,917	42,103
Net amount recognized	$ (3,994)	$ (4,812)