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Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 22, 2024 | Jul. 19, 2024 | Nov. 30, 2023 | Oct. 31, 2023 | May 31, 2021 | Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Subsequent Events |  |  |  |  |  |  |  |  |
Net proceeds issuance of common stock |  |  |  |  |  |  | $ 32,219 | $ 24,657 |
Stock offering costs |  |  |  |  |  |  | $ 281 | $ 739 |
Jefferies Sale Agreement |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Maximum value shares to be issued |  |  | $ 150,000 |  | $ 100,000 |  |  |  |
Number of shares issued |  |  |  |  |  | 2,839 | 3,486 |  | 1,408
Gross proceeds issuance of common stock |  |  |  |  |  | $ 5,472 | $ 7,215 |  | $ 27,032
Net proceeds issuance of common stock |  |  |  |  |  | 5,308 | 6,999 |  | 26,221
Stock offering costs |  |  |  |  |  | $ 164 | $ 216 |  | $ 811
BTI PSU |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Non-options granted (in shares) |  |  |  | 543 |  |  |  |  |
BTI RSU |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Non-options granted (in shares) |  |  |  |  |  |  | 5 |  |
Employee Stock Option |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Options granted (in shares) |  |  |  |  |  |  | 95 |  |
Options granted (in dollars per share) |  |  |  |  |  |  | $ 1.53 |  |
Subsequent Event | Jefferies Sale Agreement |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Number of shares issued |  | 361 |  |  |  |  |  |  |
Gross proceeds issuance of common stock |  | $ 467 |  |  |  |  |  |  |
Net proceeds issuance of common stock |  | 453 |  |  |  |  |  |  |
Stock offering costs |  | $ 14 |  |  |  |  |  |  |
Subsequent Event | BTI PSU |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Non-options granted (in shares) | 1,388 |  |  |  |  |  |  |  |
Vesting period | 1 year |  |  |  |  |  |  |  |
Subsequent Event | BTI RSU |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Non-options granted (in shares) | 20 |  |  |  |  |  |  |  |
Subsequent Event | Employee Stock Option |  |  |  |  |  |  |  |  |
Subsequent Events |  |  |  |  |  |  |  |  |
Options granted (in shares) | 538 |  |  |  |  |  |  |  |
Terms of award | 10 years |  |  |  |  |  |  |  |
Options granted (in dollars per share) | $ 1.20 |  |  |  |  |  |  |  |

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