Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets, Net of Valuation Allowance	$ 18,666	$ 21,493
Deferred Tax Liabilities, Net	552
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	98,800
Unrecognized Tax Benefits		1,400
Other Noncurrent Assets [Member]
Deferred Tax Assets, Net of Valuation Allowance	1,600	$ 2,200
Other Noncurrent Liabilities [Member]
Deferred Tax Liabilities, Net	$ 2,200