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Shareholders' Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jan. 30, 2018 | Dec. 31, 2016 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Proceeds from issuance of common stock |  |  |  | $ 877 | [1] |
Number of share issued |  |  |  | 640,163 |  |
Shares issued price per share |  |  |  | $ 1.46 |  |
Net proceeds from offering |  |  |  | $ 935 |  |
Warrant exercise price |  |  | $ 1.13 | $ 2.05 |  | $ 1.13
Fair value of warrants |  |  | $ 8 | $ 270 | [2] |
Warrant liability |  |  | 417 |  |  | $ 425
Stock-based compensation expense |  |  | 13 | $ 13 | [1],[2] |
Unrecognized share based compensation |  |  | $ 32 |  |  |
Common Stock [Member] |  |  |  |  |  |
Number of share issued |  |  |  | 640,163 |  |
Market Offering [Member] |  |  |  |  |  |
Offering expenses |  |  |  | $ 59 |  |
Registered Direct Offering [Member] |  |  |  |  |  |
Number of share issued |  | 1,000,000 |  |  |  |
Shares issued price per share |  | $ 1.50 |  |  |  |
Proceeds from warrants |  | $ 1,320 |  |  |  |
Registered Direct Offering [Member] | Warrant [Member] |  |  |  |  |  |
Warrants to purchase common stock |  | 1,000,000 |  |  |  |
Warrant exercise price |  | $ 2.05 |  |  |  |
Warrant term |  | 5 years |  |  |  |
Fair value of warrants |  | $ 1,240 |  |  |  |
Registered Direct Offering [Member] | Common Stock [Member] |  |  |  |  |  |
Fair value of warrants |  | $ 80 |  |  |  |
Common Stock Sales Agreement [Member] |  |  |  |  |  |
Proceeds from issuance of common stock | $ 2,500 |  |  |  |  |
[1] | The condensed consolidated statement of cash flows for the three months ended March 31, 2018 was restated to include the loss due to the change in the fair value of marketable equity securities of $78 thousand in net loss. The amount was originally included in other comprehensive loss.
[2] | The condensed consolidated statement of operations for the three months ended March 31, 2018 was restated to include the loss on marketable equity securities in non-operating income rather than other comprehensive income as originally reported.

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