XML 42 R31.htm IDEA: XBRL DOCUMENT v3.25.1
Note 5 - Income Taxes (Details Textual)
$ in Thousands
3 Months Ended
Mar. 31, 2025
USD ($)
Deferred Tax Assets, Net, Total $ 0
Domestic Tax Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]  
Operating Loss Carryforwards $ 363,000
Open Tax Year 2021 2022 2023 2024
Open Tax Period (Year) 3 years
Domestic Tax Jurisdiction [Member] | California Franchise Tax Board [Member]  
Operating Loss Carryforwards $ 341,000
Open Tax Year 2020 2021 2022 2023 2024
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]  
Open Tax Period (Year) 4 years