Note 16 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Expense (Benefit), Total	$ (599,000)	$ (4,988,000)	$ (4,937,000)	$ (17,540,000)
Effective Income Tax Rate Reconciliation, Percent, Total			5.00%
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount			$ 510,000
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount			$ 397,000
Effective Income Tax Rate Reconciliation, Before Discrete Items, Percent			5.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Deferred Tax Assets, Valuation Allowance	$ 20,500,000		$ 20,500,000