Note 5 - Income Taxes - Major Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Domestic	$ (10,702)	$ 3,892	$ 7,761
Foreign	(13,713)	(5,376)	(619)
Total current income tax (provision) benefit	(24,415)	(1,484)	7,142
Deferred:
Domestic	7,480	(75,456)	(1,572)
Foreign	(10,493)	20,630	(330)
Total deferred income tax (provision) benefit	(3,013)	(54,826)	(1,902)
Total income tax benefit (provision)	$ (27,428)	$ (56,310)	$ 5,240