v3.25.4
Income taxes, Deferred tax assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Deferred tax assets [Abstract]    
Federal net operating losses $ 3,545 $ 276
Foreign net operating losses 870 802
State net operating losses 221 135
Accrued severance 12 20
Capitalized R&D expenses 0 3,708
Inventory reserves 1,086 1,047
Deferred revenue 13 7
Warranty reserve 31 29
Stock compensation expense 1,043 853
Other accrued compensation 496 165
R&D credit carryforward 1,217 903
Other Assets 425 379
Gross deferred tax assets 8,959 8,324
Valuation allowance (8,664) (8,103)
Net deferred tax assets 295 221
Deferred tax liabilities [Abstract]    
Depreciation and amortization 251 179
Other 44 42
Net deferred tax liabilities 295 221
Total net deferred tax assets $ 0 $ 0