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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2018
Income Tax Disclosure [Abstract] |
Schedule of Reconciliation Statutory Federal Income Tax Provision to Actual Income Tax Benefit | The following is a reconciliation of the expected statutory federal income tax provision to the actual income tax expense:
|  | December 31, |
|  | 2018 |  |  | 2017 |
Federal statutory rate |  |  | (21.0 | )% |  |  | (35.0 | )%
State taxes, net of federal benefit |  |  | (2.9 | )% |  |  | (5.1 | )%
Return to provision |  |  | 0.0 | % |  |  | (0.2 | )%
Equity related expenses |  |  | (10.7 | )% |  |  | (10.4 | )%
Change in statutory rate |  |  | 0.0 | % |  |  | 272.7 | %
Change in valuation allowance |  |  | 17.7 | % |  |  | (222.1 | )%
Goodwill impairment |  |  | 14.7 | % |  |  | 0.0 | %
Other permanent differences |  |  | 2.2 | % |  |  | 0.1 | %
Total income tax expense |  |  | 0.0 | % |  |  | 0.0 | %
|  | December 31, |
|  | 2018 |  |  | 2017 |
Pre-tax book income at statutory rate |  | $ | (1,845 | ) |  | $ | (3,265 | )
State taxes, net of federal benefit |  |  | (252 | ) |  |  | (479 | )
Return to provision |  |  | 4 |  |  |  | (21 | )
Equity related expenses |  |  | 501 |  |  |  | (970 | )
Changer in statutory rate |  |  | - |  |  |  | 25,447 |
Change in valuation allowance |  |  | 1,556 |  |  |  | (20,723 | )
Other |  |  | 36 |  |  |  | 11 |
Total income tax expense |  | $ | - |  |  | $ | - |
Schedule of Significant Components of Deferred Tax Assets and Liabilities | Significant components of the Company’s deferred tax assets and liabilities were as follows (in thousands):
|  | December 31, |
|  | 2018 |  |  | 2017 |
Deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 46,096 |  |  | $ | 41,840 |
Stock-based compensation |  |  | 2,918 |  |  |  | 2,907 |
Inventory reserve |  |  | - |  |  |  | 2,340 |
Federal R&D credit |  |  | 2,222 |  |  |  | 2,222 |
Accrued expenses |  |  | 49 |  |  |  | 492 |
Depreciation |  |  | - |  |  |  | - |
Other |  |  | 98 |  |  |  | 108 |
Total deferred tax assets |  |  | 51,383 |  |  |  | 49,909 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Depreciation |  |  | (31 | ) |  |  | (37 | )
Intangibles |  |  | (134 | ) |  |  | (210 | )
Total deferred tax liabilities |  |  | (165 | ) |  |  | (247 | )
Less valuation allowance |  |  | (51,352 | ) |  |  | (49,796 | )
Net deferred tax liability |  | $ | (134 | ) |  | $ | (134 | )

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