Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Components Of Income Tax Expense Benefit [Line Items]    
Computed "expected" tax-benefit - Federal $ (2,818) $ (5,267)
Computed "expected" tax-benefit - State (636) (613)
Adjustment of "expected" tax-benefit to actual 19 (2)
Meals, entertainment and other 3 10
Non-deductible stock-based compensation 266 502
Fair Market Value Adjustment - Warrants (1,051) (4,076)
Impact of U.S. tax reform 0 21,555
Change in valuation allowance 4,217 (12,109)
Income tax expense $ 0 $ 0