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Schedule of Deferred Tax Assets (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]    
Depreciation $ 109,000 $ 106,000
Allowance for bad debts 248,000 218,000
Net operating loss carry-forwards 13,561,000 14,114,000
Stock option expense 334,000 355,000
Research and other credits 891,000 945,000
Lease liability 99,000 138,000
Amortization 130,000
Total gross deferred tax assets 15,372,000 15,876,000
Lease liability 69,000 101,000
Other temporary differences 22,000
Total gross deferred tax liabilities 69,000 123,000
Valuation allowance (15,303,000) (15,753,000)
Net deferred tax