v3.26.1
Note 10 - Income Taxes - Reconciliation of Effective Income Tax Rate (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Federal income taxes at the statutory rate $ (5,705) $ (6,528)
Federal income taxes at the statutory rate, percent 21.00% 21.00%
Changes in valuation allowance   $ 8,597
State changes in valuation allowance, percent   (27.70%)
Other $ 264 $ 1
Other, percent (1.00%) (0.00%)
Foreign tax effects $ (26) $ (56)
Foreign tax effects, percent 0.10% 0.20%
Effect of changes in tax laws or rates enacted in the current period $ 0  
Effect of changes in tax laws or rates enacted in the current period, percent 0.00%  
Effect of cross-border tax laws $ 9  
Effect of cross-border tax laws, percent (0.00%)  
Research and development credit $ (1,015) $ (1,194)
Research and development credit, percent 3.70% 3.80%
Non-taxable or non-deductible items $ 45 $ 39
Non-taxable or non-deductible items, percent (0.20%) (0.10%)
Changes in unrecognized tax benefits $ 0 $ (1,480)
Changes in unrecognized tax benefits, percent 0.00% 4.80%
Total income tax benefit $ (2) $ (1,811)
Income tax benefit, percent 0.00% 5.80%
Share-based compensation shortfall (windfall)   $ 6
Share-based compensation shortfall (windfall), percent   (0.00%)
Effect of state taxes, net of federal tax benefit   $ (999)
Effect of state taxes, net of federal tax benefit, percent   3.20%
Non-deductible items $ 45 $ 39
Return to provision adjustment   $ (540)
Return to provision adjustment, percent   1.70%
Deferred only adjustments   $ 343
Deferred only adjustments, percent   (1.10%)
State and Local Jurisdiction [Member]    
Changes in valuation allowance $ 1,576  
State changes in valuation allowance, percent (5.80%)  
Other $ (1,565)  
Other, percent 5.80%  
Domestic Tax Jurisdiction [Member]    
Changes in valuation allowance $ 6,415  
State changes in valuation allowance, percent (23.60%)