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Financing Activity - Registered direct offering (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Feb. 06, 2025 | Nov. 27, 2024 | Nov. 26, 2024 | Nov. 14, 2024 | Nov. 13, 2024 | Jan. 31, 2024 | Jan. 30, 2024 | Aug. 14, 2023
Financing Activity |  |  |  |  |  |  |  |  |  |
Proceeds from registered direct offering | $ 23,900 | $ 15,923 |  |  |  |  |  |  |  |
Expenses paid for Registered Direct Offering | 357 | $ 1,182 |  |  |  |  |  |  |  |
Subsequent event |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Remaining committed fund |  |  | $ 5,000 |  |  |  |  |  |  |
Class A Warrant |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Exercise price of warrants |  |  |  |  |  | $ 2 | $ 3 |  |  |
Class B Warrants | Subsequent event |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Number of shares agreed to sell and issue |  |  | 2,500,000 |  |  |  |  |  |  |
Common Shares | Subsequent event |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Number of shares agreed to sell and issue |  |  | 5,000,000 |  |  |  |  |  |  |
2023 Registered Direct Offering |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Exercise price of warrants |  |  |  |  |  |  |  | $ 3 |  |
Remaining committed fund | 23,600 |  |  |  |  |  |  |  | $ 9,000 |
Proceeds from registered direct offering | 24,900 |  |  |  |  |  |  |  |  |
Expenses paid for Registered Direct Offering | 1,300 |  |  |  |  |  |  |  |  |
Net proceeds from Registered Direct Offering | 23,600 |  |  |  |  |  |  |  |  |
2023 Registered Direct Offering | Class A Warrant |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Number of shares agreed to sell and issue |  |  |  |  |  |  |  |  | 2,250,000 |
Share price |  |  |  |  |  |  |  |  |  | $ 2
Exercise price of warrants |  |  |  |  |  |  |  |  |  | $ 3
Remaining committed fund | 4,700 |  |  |  |  |  |  |  |  |
2023 Registered Direct Offering | Common Shares |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Number of shares agreed to sell and issue |  |  |  |  |  |  |  |  | 4,500,000 | 12,461,540
Remaining committed fund | 18,900 |  |  |  |  |  |  |  |  |
2023 Registered Direct Offering | Common Shares | Class A Warrant |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Number of shares agreed to sell and issue |  |  |  |  |  |  |  |  |  | 6,230,770
2024 Registered Direct Offering |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Remaining committed fund | 14,200 |  |  |  |  |  |  |  |  |
Proceeds from registered direct offering | 14,900 |  |  |  |  |  |  |  |  |
Expenses paid for Registered Direct Offering | 700 |  |  |  |  |  |  |  |  |
Net proceeds from Registered Direct Offering | $ 14,200 |  |  |  |  |  |  |  |  |
2024 Registered Direct Offering | Class B Warrants |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Share price |  |  |  |  |  | 1 |  |  |  |
Exercise price of warrants | $ 2 |  |  |  |  | $ 2 |  |  |  |
Remaining committed fund | $ 4,500 |  |  |  |  |  |  |  |  |
2024 Registered Direct Offering | Common Shares |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Number of shares agreed to sell and issue | 14,900,000 |  |  | 19,900,000 | 2,400,000 | 17,500,000 |  |  |  |
Remaining committed fund | $ 9,700 |  |  |  |  |  |  |  |  |
2024 Registered Direct Offering | Common Shares | Class B Warrants |  |  |  |  |  |  |  |  |  |
Financing Activity |  |  |  |  |  |  |  |  |  |
Number of shares agreed to sell and issue | 7,450,000 |  |  | 9,950,000 | 1,200,000 | 8,750,000 |  |  |  |

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