Note 7 - Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Net operating losses	$ 74,195	$ 71,215
Fixed asset basis difference	10,662	6,457
Contributions carryover	5	5
Deferred compensation	2,375	2,513
Accrued liabilities	389	315
Total deferred tax assets	87,626	80,505
Valuation allowance for deferred tax assets	(87,626)	(80,505)
Net deferred tax asset