Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Net operating loss carryforwards	$ 67,673	$ 67,014
Intangible assets	1,968	5,040
Accrual and reserves	3,119	2,462
Other	6	77
Total noncurrent deferred tax assets	72,766	74,593
Valuation allowance	(70,066)	(74,121)
Noncurrent deferred tax assets, net of valuation allowance	2,700	472
Fixed assets	2,700	476
Total noncurrent deferred tax liabilities	2,700	476
Net deferred income tax liability		$ (4)