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17. INCOME TAXES (Details 3) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Reserve for Bad Debt $ 109,000 $ 31,000
Inventory Reserve 0 28,000
Accrued Vacation 82,000 92,000
Warranty Reserve 19,000 8,000
Intangible Assets 412,000 381,000
Operating Lease Right-of-use Liabilities 290,000 310,000
Net Operating Losses 3,100,000 5,223,000
Valuation Allowance (3,530,000) (5,580,000)
Deferred Tax Assets 482,000 493,000
Deferred tax liabilities:    
Operating Lease Right-of-use Assets (290,000) (302,000)
Property Plant and Equipment (192,000) (191,000)
Deferred Tax Liabilities (482,000) (493,000)
Net Deferred Tax Assets and Liabilities $ 0 $ 0