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Capital Stock - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Jan. 21, 2021 | Dec. 10, 2020 | Dec. 06, 2020 | Oct. 21, 2020 | Oct. 01, 2019 | Jun. 30, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of convertible preferred stock, shares (in shares) |  |  |  |  |  | 1,315,790 |  |  |  |  |  |  |
Issuance of stock for services |  |  |  |  |  |  | $ 116 | $ 274 |  |  |  |  |
Exercised |  |  |  |  |  |  |  |  |  |  |  | $ 0.01 |
Issuance of common shares from warrant exercise (in shares) |  |  |  |  | 521,500 |  |  |  |  |  |  |  |
Warrant term |  |  |  |  | 2 years |  |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ 4.42 |  |  |  |  |  | $ 4.42 |  |  | $ 4.42 |  | $ 4.85 | $ 0.01
Warrant exercises | 0 |  |  |  |  |  | 0 |  |  | 0 |  |  |
Issuance costs | $ 896 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from stock issuance, net of issuance costs | $ 11,504 |  |  |  |  |  |  |  |  | $ 11,504 | $ 0 |  |
Public Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) | $ 4.00 |  |  |  |  |  | $ 4.00 |  |  | $ 4.00 |  |  |
General and administrative expense |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued professional fees |  |  |  |  |  |  | $ 116 |  |  | $ 390 |  |  |
Warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common shares from warrant exercise (in shares) |  |  |  | 625,000 |  |  |  |  |  |  |  |  |
Warrant term |  |  |  | 2 years |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) |  |  |  | $ 5.49 | $ 4.08 |  |  |  |  |  |  |  |
Warrants | Public Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Warrants | Private Placement |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) | 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) | $ 4.40 |  |  |  |  |  | $ 4.40 |  |  | $ 4.40 |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of convertible preferred stock, shares (in shares) |  |  |  |  |  |  |  |  | 50,000 | 18,846,411 | 50,000 |  |
Issuance of shares for professional service fees (in shares) |  | 21,008 | 50,000 |  |  |  |  | 21,008 |  |  |  |  |
Issuance of stock for services |  | $ 100 | $ 348 |  |  |  |  |  |  |  |  |  |
Common Stock | Public Offering |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) | $ 4.00 |  |  |  |  |  | 4.00 |  |  | $ 4.00 |  |  |
Common Stock | Private Placement |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock gross | $ 12,400 |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (in dollars per share) | $ 4.40 |  |  |  |  |  | $ 4.40 |  |  | $ 4.40 |  |  |
Series A Warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant term | 6 months |  |  |  |  |  | 6 months |  |  | 6 months |  |  |
Series B Warrants |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant term | 3 years |  |  |  |  |  | 3 years |  |  | 3 years |  |  |

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