Note 16 - Income Taxes - Components of the Net Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accrued compensation	$ 110	$ 154
Inventory adjustments	449	708
Depreciation and amortization - noncurrent	146	252
Share-based compensation	558	273
Net operating loss and tax credit carryforwards - noncurrent	17,368	20,196
Other	34	47
Gross deferred tax asset	18,665	21,630
Valuation allowance	(18,665)	(21,630)
Net deferred tax asset