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Common Shares - ATM Agreement (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) shares | Jun. 30, 2020 USD ($) shares | Jun. 30, 2021 USD ($) security shares | Jun. 30, 2020 USD ($) shares
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  | $ 1,062 | $ 807
At-The-Market Offering Agreement [Member] | H. C. Wainwright And Co., LLC [Member] |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Threshold of aggregate sales proceeds | $ 10,000 |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  | 392,470 | 1,031,819 | 798,270 | 1,031,819
Proceeds from Issuance of Common Stock |  | $ 437 | $ 807 | $ 871 | $ 807
Offers or sales of common shares under Agreement to be made in Canada | security |  |  |  | 0 |

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