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Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 16, 2018 | Nov. 19, 2018 | Oct. 29, 2018 | Apr. 27, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Warrants (Textual) |  |  |  |  |  |
Fair value of warrants on the issuance |  |  |  |  | $ (21) | $ (837)
Underwritten public offering shares |  |  | 653,062 |  |  |
Slipstream Communications, Llc [Member] | Loan and Security Agreement [Member] |  |  |  |  |  |
Warrants (Textual) |  |  |  |  |  |
Revolving loan | $ 1,000 |  |  | $ 1,100 |  |
Interest rate per annum | 8.00% |  |  | 8.00% |  |
Maturity date | Jan. 16, 2019 |  |  |  |  |
Warrant to purchase common stock | 61,729 |  |  | 143,791 |  |
Price per share | $ 8.10 |  |  | $ 7.65 |  |
Fair value of warrants on the issuance | $ 266 |  |  | $ 543 |  |
Price per share subject to subsequent abjustment | $ 6.09 |  |  | $ 6.25 |  |
IPO [Member] |  |  |  |  |  |
Warrants (Textual) |  |  |  |  |  |
Gross proceeds to public offering |  | $ 10,000 |  |  |  |
Underwritten public offering shares |  | 2,857,142 |  |  |  |
Common stock and warrants to purchase |  | 1,428,571 |  |  |  |
Public offering price |  | $ 3.50 |  |  |  |
Repayment of debt |  | $ 1,283 |  |  |  |

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