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

Note 16 - Income Taxes - Reconciliation of Income Taxes (Details)

v3.26.1
Note 16 - Income Taxes - Reconciliation of Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
State and local income taxes, net of federal income tax effect(a) [1] $ 2 $ 3
State and local income taxes, net of federal income tax effect(a), percent [1] (0.01%) (0.01%)
Research and development tax credits $ (69) $ (85)
Research and development tax credits, percent 0.31% 0.35%
Change in valuation allowance $ 4,409 $ 4,871
Change in valuation allowance, percent (19.54%) (19.84%)
Equity compensation $ 328 $ 360
Equity compensation, percent (1.45%) (1.47%)
Other, net $ 71 $ 10
Other, net, percent (0.32%) (0.04%)
Changes in unrecognized tax benefits $ 0 $ 0
Changes in unrecognized tax benefits, percent 0.00% 0.00%
Total provision for income taxes $ 2 $ 3
Effective income tax rate, percent (0.01%) (0.01%)
Domestic Tax Jurisdiction [Member]    
U.S. federal statutory tax rate $ (4,739) $ (5,156)
U.S. federal statutory tax rate, percent 21.00% 21.00%
[1] State taxes in California made up the majority (greater than 50 percent) of the tax effect in this category for the years ended December 31, 2025 and 2024.