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Income Taxes (Details 2) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Current:    
Net operating losses $ 6,594,000 $ 8,017,000
Allowance for doubtful accounts 252,000 216,000
Inventory – IRC 263A adjustment 341,000 268,000
Stock based compensation - options and restricted stock 277,000 150,000
Capitalized engineering costs 336,000 323,000
Deferred rent 4,000 12,000
Amortization - NTW Transaction 495,000 442,000
Inventory reserves 1,250,000 1,000,000
Deferred gain on sale of real estate 132,000 84,000
Accrued Expenses 158,000 165,000
Disallowed interest 1,813,000 1,431,000
Right of Use Asset 292,000 329,000
Total non-current deferred tax assets before valuation allowance 11,944,000 12,437,000
Valuation allowance (9,394,000) (10,663,000)
Total non-current deferred tax assets after valuation allowance 2,550,000 1,774,000
Deferred tax liabilities:    
Property and equipment (2,150,000) (1,628,000)
Other (400,000) (146,000)
Total deferred tax liabilities (2,550,000) (1,774,000)
Net deferred tax asset