Note 18 - Income Taxes - Deferred Income Taxes (Details) (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current deferred tax assets, valuation allowance	$ 163	$ 0
Noncurrent deferred tax assets, valuation allowance	27,260	21,513
Noncurrent deferred tax liabilities, valuation allowance	$ 0	$ 0