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Income Taxes (Details - Deferred tax assets and liabilities) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]    
Net operating loss carryforwards $ 16,493 $ 15,998
Net operating loss carryforwards of foreign subsidiaries 56 56
Depreciation expense (341) (182)
Stock-based compensation expense 608 528
Other 550 546
Net deferred tax assets 17,366 16,946
Valuation allowance for net deferred tax assets (17,366) (16,946)
Net deferred tax assets, net of valuation allowance $ 0 $ 0