Annual report [Section 13 and 15(d), not S-K Item 405]

Income Taxes (Details Narrative)

v3.25.1
Income Taxes (Details Narrative) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items]    
Changes in valuation allowance $ 4,500 $ 5,300
Unrecognized tax benefits 0  
California Franchise Tax Board [Member]    
Effective Income Tax Rate Reconciliation [Line Items]    
Operating loss carryforwards 121,500  
Domestic Tax Jurisdiction [Member]    
Effective Income Tax Rate Reconciliation [Line Items]    
Operating loss carryforwards $ 132,000  
Operating loss carry forwards expiration year 2037  
Operating loss carry forwards not subject to expiration $ 63,800  
Operating loss carryforwards, limitations on use percentage 80.00%  
Domestic Tax Jurisdiction [Member] | Research Tax Credit Carryforward [Member]    
Effective Income Tax Rate Reconciliation [Line Items]    
Operating loss carryforwards $ 5,100  
Operating loss carry forwards expiration year 2044  
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member]    
Effective Income Tax Rate Reconciliation [Line Items]    
Tax credit carryforward, amount $ 9,100