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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 |  |

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