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Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Summary of Significant Accounting Policies (Textual) |  |  |
Federal Deposit Insurance Corporation | $ 250 |  |
Reserve for doubtful accounts | 59 |  | $ 40
Inventory net of allowance | 10 |  | $ 10
Depreciation and amortization expense | 327 | $ 79 |
Research and development and software development costs | 59 | 135 |
Outstanding stock options and warrants | 48,500 | 35,900 |
Dividends on convertible preferred stock | 0 | 113 |
Stock based compensation expense | $ 64 | 71 |
Warrants to purchase common stock | 16,482,635 |  |
Intangible assets amortizes costs | Over 5 years once |  |
Impairment losses for loss on long lived assets |  |  |
Convertible promissory notes | $ 38,400 | $ 37,700 |

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