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Shareholders' Equity - (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | Sep. 12, 2021 | Sep. 13, 2020 | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Common stock, par value (in dollars per share) |  |  | $ 0.001 | $ 0.001
Common Stock |  |  |  |
Number fo shares issued issued and sold in a registered direct offering | 3,623,189 | 2,116,050 |  |
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |  |
Offering price (Per share) | $ 2.76 | $ 2.4925 |  |
Proceeds from issuance of common stock, gross | $ 10,000 | $ 5,275 |  |
Proceeds from issuance of common stock, net of issuance costs | $ 9,288 | $ 4,764 |  |
Common stock shares issued for warrants exercisable | 3,623,189 | 1,058,025 |  |
Exercise price of warrants | $ 2.76 | $ 2.43 |  |
Expiry term of warrants |  | 5 years |  |

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