Note 15 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforward Subject to Expiration	$ 703
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 52,004
Operating Loss Carryforwards, Tax Deductions From Stock Options Exercises and RSU Vesting	3,168	$ 720
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Tax Deductions From Stock Options Exercises and RSU Vesting	$ 3,168	$ 720