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Income Taxes - Income Tax Benefit Attributable to Our Loss from Operations (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Amount [Abstract]    
U.S. federal income tax benefit at statutory rates $ (2,085,000) $ (4,058,000)
State income tax benefit, net of federal benefit (357,000) (695,000)
Research and experimentation credits   (560,000)
Deferred tax asset adjustment 2,000  
Other 186,000 185,000
Change in valuation allowance 2,254,000 5,128,000
Income tax benefit $ 0 $ 0