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Income Taxes (Details ) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets -liabilities): |  |
Reserves | $ 12 | $ 35
Property and equipment | 80 | 171
Accrued expenses | 619 | 1,034
Severance | 56 | 39
Non-qualified stock options | 268 | 420
Net foreign carryforwards | 1,906 | 1,844
Net operating loss and credit carryforwards | 6,801 | 8,054
Intangibles | 605 | 907
Total deferred tax assets | 10,347 | 12,504
Valuation allowance | (10,896) | (13,114)
Net deferred tax liabilities | $ (549) | $ (610)

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