Note 7 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued liabilities	$ 25,470	$ 8,046
Allowance for doubtful accounts	2,630	7,364
Stock-based compensation	11,530	19,503
Inventory reserve	9,131	8,712
Deferred Tax Assets, Operating Loss Carryforwards	231,360	68,821
163(j) interest	58,426	15,345
Amortization of goodwill and intangible assets	4,526
Other	(3,774)	(3,567)
Total deferred tax assets	346,847	131,358
Prepaids	(2,123)	(9,677)
Earnout liabilities		(4,328)
Depreciation on property, plant and equipment	(179,428)	(228,981)
Amortization of goodwill and intangible assets		(28,033)
Other	(3,873)	(378)
Total deferred tax liabilities	(185,424)	(271,397)
Valuation allowances	(171,016)	(77)
Net deferred tax liability	$ (9,593)	$ (140,116)