Nature of Operations (Q3) (Details) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 22, 2023 |
Feb. 27, 2023
USD ($)
|
Aug. 12, 2021
USD ($)
|
Sep. 30, 2024
USD ($)
mission
satellite
|
Jun. 30, 2024
USD ($)
|
Mar. 31, 2024
USD ($)
|
Sep. 30, 2023
USD ($)
|
Jun. 30, 2023
USD ($)
|
Mar. 31, 2023
USD ($)
|
Sep. 30, 2024
USD ($)
mission
satellite
|
Sep. 30, 2023
USD ($)
|
Dec. 31, 2023
USD ($)
mission
satellite
|
Dec. 31, 2022
USD ($)
|
|
| Schedule of Reverse Recapitalization [Line Items] | |||||||||||||
| Number of spacecraft missions | mission | 4 | 4 | 4 | ||||||||||
| Number of customer satellites deployed in orbit | satellite | 17 | 17 | 17 | ||||||||||
| Number of spacecraft missions in orbit | mission | 3 | 3 | |||||||||||
| Additional funding received in connection with business combination | $ 247,300 | $ 247,300 | |||||||||||
| Net loss | $ 7,758 | $ 7,016 | $ 8,313 | $ 15,159 | $ 18,835 | $ 20,825 | $ 23,087 | $ 54,819 | $ 68,920 | $ 95,444 | |||
| Accumulated deficit | 396,134 | 396,134 | 373,047 | 304,127 | |||||||||
| Net cash used in operating activities | 10,874 | $ 45,987 | 61,826 | 87,887 | |||||||||
| Cash and cash equivalents | $ 798 | $ 798 | $ 2,118 | $ 61,094 | |||||||||
| Common Class A | |||||||||||||
| Schedule of Reverse Recapitalization [Line Items] | |||||||||||||
| Stock split ratio | 0.02 | ||||||||||||
| X | ||||||||||
- Definition Number Of Customer Satellites Deployed In Orbit No definition available.
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| X | ||||||||||
- Definition Number Of Spacecraft Missions No definition available.
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| X | ||||||||||
- Definition Number Of Spacecraft Missions In Orbit No definition available.
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| X | ||||||||||
- Definition Reverse Recapitalization, Proceeds Received From Shareholders No definition available.
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| X | ||||||||||
- Definition Schedule Of Reverse Recapitalization [Line Items] No definition available.
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of accumulated undistributed earnings (deficit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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