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v3.25.4

Schedule of effective tax rate (Details) | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Income Tax Disclosure [Abstract] |  |
U.S. federal statutory rate | 21.00% | 21.00%
State of California statutory rate | 8.80% | 8.80%
State of California tax deduction on federal | (1.80%) | (1.80%)
Tax rate differential outside of U.S. | (3.30%) | (8.50%)
Deferred tax assets relating to valuation allowance | (26.30%) | (20.10%)
Effective tax rate | (1.60%) | (0.60%)

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