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Income Taxes (Details 2) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Current:    
Net operating losses $ 6,811,000 $ 7,730,000
Bad debts 124,000 135,000
Inventory - 263A adjustment 248,000 591,000
Accounts payable, accrued expenses and reserves
Total current deferred tax assets before valuation allowance 7,183,000 8,456,000
Valuation allowance (7,183,000) (8,456,000)
Total current deferred tax assets after valuation allowance
Non-current:    
Stock based compensation - options and restricted stock 161,000 124,000
Capitalized engineering costs 809,000 281,000
Deferred rent 248,000 299,000
Amortization - NTW Transaction 810,000 519,000
Inventory reserves 942,000 960,000
Deferred gain on sale of real estate 80,000 80,000
Accrued Expenses 49,000
Disallowed interest 918,000
Other 314,000 114,000
Total non-current deferred tax assets before valuation allowance 4,331,000 2,377,000
Valuation allowance (2,952,000) (758,000)
Total non-current deferred tax assets after valuation allowance 1,379,000 1,619,000
Deferred tax liabilities:    
Property and equipment (1,379,000) (1,619,000)
Amortization – NTW Goodwill
Amortization – Welding Transaction
Total non-current deferred tax liabilities (1,379,000) (1,619,000)
Net non-current deferred tax asset