Note 10 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Net operating loss carryforwards	$ 25,643	$ 23,327
Stock based compensation	43	1,626
Reserves , loans and accrued expense	313	421
Gross deferred tax assets	25,999	25,374
Valuation allowance	26,040	(25,193)
Gross deferred tax assets after valuation allowance	41	181
Deferred tax liability - Intangible and fixed assets	(41)	(181)
Net deferred tax liabilities	$ 0	$ 0