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Income Taxes (Details 3) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Accruals | $ 111 | $ 126
Stock compensation | 789 | 1,466
Net operating losses | 14,288 | 20,015
Basis difference in fixed assets |  | 13
Total deferred tax assets | 15,188 | 21,620
Valuation allowance | (15,188) | (21,620)
Total net deferred tax assets |  |

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