CONSOLIDATED STATEMENTS OF OPERATIONS (FY) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2024 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Sep. 30, 2023 |
Jun. 30, 2023 |
Mar. 31, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Dec. 31, 2023 |
Dec. 31, 2022 |
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| Income Statement [Abstract] | ||||||||||
| Revenue from contract with customer, product and service, extensible enumeration | us-gaap:ServiceMember | us-gaap:ServiceMember | us-gaap:ServiceMember | us-gaap:ServiceMember | us-gaap:ServiceMember | us-gaap:ServiceMember | ||||
| Service revenue | $ 107 | $ 339 | $ 1,829 | $ 2,066 | $ 3,089 | $ 299 | ||||
| Cost of revenue | 66 | 119 | 66 | 507 | 855 | 26 | ||||
| Gross profit | 41 | 220 | 1,763 | 1,559 | 2,234 | 273 | ||||
| Operating expenses: | ||||||||||
| Research and development expenses | 2,205 | 5,992 | 7,731 | 26,315 | 34,351 | 41,721 | ||||
| Selling, general and administrative expenses | 5,429 | 9,294 | 16,916 | 29,571 | 36,055 | 49,827 | ||||
| Total operating expenses | 7,634 | 15,286 | 24,647 | 55,886 | 70,406 | 91,548 | ||||
| Loss from operations | (7,593) | (15,066) | (22,884) | (54,327) | (68,172) | (91,275) | ||||
| Other income (expense), net: | ||||||||||
| Change in fair value of warrant liability | 0 | 221 | 0 | 559 | 561 | 5,185 | ||||
| Realized loss on disposal of assets | (133) | 0 | (188) | (17) | (17) | (168) | ||||
| Interest income | 2 | 216 | 24 | 1,128 | 1,225 | 522 | ||||
| Interest expense | (43) | (530) | (100) | (2,182) | (2,337) | (5,262) | ||||
| Litigation settlement, net | 0 | (4,500) | ||||||||
| Other income (expense) | 9 | 0 | 61 | 20 | (180) | 54 | ||||
| Total other income (expense), net | (165) | (93) | (203) | (492) | (748) | (4,169) | ||||
| Net loss | $ (7,758) | $ (7,016) | $ (8,313) | $ (15,159) | $ (18,835) | $ (20,825) | $ (23,087) | $ (54,819) | $ (68,920) | $ (95,444) |
| Net loss per share, basic (in dollars per share) | $ (0.45) | $ (7.2) | $ (1.49) | $ (28.45) | $ (23.13) | $ (58.53) | ||||
| Net loss per share, diluted (in dollars per share) | $ (0.45) | $ (7.2) | $ (1.49) | $ (28.45) | $ (23.13) | $ (58.53) | ||||
| Weighted average shares outstanding, basic (in shares) | 17,357,896 | 2,106,707 | 15,514,688 | 1,927,049 | 2,979,845 | 1,630,762 | ||||
| Weighted average shares outstanding, fully diluted (in shares) | 17,357,896 | 2,106,707 | 15,514,688 | 1,927,049 | 2,979,845 | 1,630,762 | ||||
| X | ||||||||||
- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount of interest expense classified as nonoperating. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Indicates product and service for revenue from satisfaction of performance obligation by transferring promised product and service to customer. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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