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Income Taxes (Details 3) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
Accruals | $ 71 | $ 111
Stock compensation | 567 | 789
Net operating losses | 14,982 | 14,288
Basis difference in fixed assets |  |
Total deferred tax assets | 15,620 | 15,188
Valuation allowance | (15,620) | (15,188)
Total net deferred tax assets |  |

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