Stockholders' Equity (Deficit) - Public and Private Warrants (Q3) (Details) - $ / shares |
Sep. 30, 2024 |
Jan. 12, 2024 |
Dec. 31, 2023 |
Nov. 09, 2023 |
Nov. 08, 2023 |
|---|---|---|---|---|---|
| Class of Warrant or Right [Line Items] | |||||
| Number of warrants outstanding (in shares) | 1,716,000 | ||||
| Exercise price (in dollars per share) | $ 0.96 | $ 2 | |||
| Common Class A | |||||
| Class of Warrant or Right [Line Items] | |||||
| Exercise price (in dollars per share) | $ 575 | $ 575 | |||
| Public Warrant | |||||
| Class of Warrant or Right [Line Items] | |||||
| Number of warrants outstanding (in shares) | 172,500 | 172,500 | |||
| Private Placement Warrant | |||||
| Class of Warrant or Right [Line Items] | |||||
| Number of warrants outstanding (in shares) | 225,450 | 225,450 |