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Income Taxes (Details 2) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets (liabilities): |  |
Reserves | $ 175 | $ 233
Property and equipment | (83) | 462
Accrued expenses | 265 | 822
Right-of-use Asset | (414) |
Right-of-use Liability | 419 |
Severance |  | 65
IRC 163(j) Interest Deduction | 17 | 591
Non-qualified stock options | 528 | 336
R&D credits | 1,801 | 1,538
Net foreign carryforwards | 2,768 | 2,214
Net operating loss and credit carryforwards | 34,754 | 33,988
Intangibles | (1,128) | (672)
Total deferred tax assets, net | 39,102 | 39,577
Valuation allowance | (39,277) | (39,705)
Net deferred tax liabilities | $ (175) | $ (128)

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