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

Note 14 - Income Taxes - Schedule of Income Tax Reconciliation (Details)

v3.25.4
Note 14 - Income Taxes - Schedule of Income Tax Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
U.S. federal statutory income tax rate $ (2,456)  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00%
State tax, net of federal tax effect $ 0  
State tax, net of federal tax effect, percent 0.00% 0.00%
Changes in valuation allowances $ 2,194  
Changes in valuation allowances, percent (18.80%) (13.50%)
Prior year true-ups $ (157)  
Prior year true-ups, percent 1.30%  
Other $ 41  
Other, percent (0.30%)  
Imputed interest income $ 154  
Imputed interest income, percent (1.30%)  
Unrealized gain $ (394)  
Unrealized gain, percent 3.40%  
Stock-based compensation $ 427  
Stock-based compensation, percent (3.70%) (4.70%)
Total tax expense (benefit) $ 0  
Total tax expense (benefit), percent 0.00% 0.00%
Federal tax at statutory rate 21.00% 21.00%
State tax, net of federal tax effect 0.00% 0.00%
Research and development credit   (0.10%)
Change in valuation allowance (18.80%) (13.50%)
Unrealized gain on warrant   0.70%
Other   (2.80%)
Foreign   (0.60%)
Foreign Tax Jurisdiction [Member] | Federal Ministry of Finance, Germany [Member]    
Changes in valuation allowances $ 553  
Changes in valuation allowances, percent (4.70%)  
Prior year true-ups $ (293)  
Prior year true-ups, percent 2.50%  
Change in valuation allowance (4.70%)  
Foreign Tax Jurisdiction [Member] | Other Foreign Authority [Member]    
Changes in valuation allowances $ (22)  
Changes in valuation allowances, percent 0.20%  
Other $ (47)  
Other, percent 0.40%  
Change in valuation allowance 0.20%