Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,276	$ 3,249
Tax Credit Carryforward, Amount	2,900
Income Taxes Receivable, Current	13,300	$ 37,000
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Operating Loss Carryforwards	33,500
Deferred Tax Assets, Operating Loss Carryforwards	$ 3,200
Open Tax Year	2021 2022 2023 2024 2025
Domestic Tax Jurisdiction [Member]
Tax Credit Carryforward, Amount	$ 11,700
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2022 2023 2024 2025