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INCOME TAXES (Details 3) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
Accrued expenses | $ 37 | $ 25
Deferred Revenue | 217 | 217
Accounts receivable | 18 | 19
Inventory | 117 | 92
Stock based compensation | 138 | 137
Tax Credits and NOL Carryforward | 354 | 1,141
Other | 150 | 6
Property and equipment | 0 | 35
Amortization | 57 | 64
Long-term deferred tax assets | 1,088 | 1,736
Less: Valuation allowance | (172) | (1,727)
Deferred tax assets | 916 | 9
Deferred tax Liabilities: |  |
Property and equipment | (176) | 0
Prepaid Expenses | (15) | (9)
Deferred tax liabilities | (191) | (9)
Net Deferred tax assets | $ 725 | $ 0

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