Income Taxes - Schedule of Deferred Tax Assets and Liabilities (FY) (Details) - USD ($) $ in Thousands |
Dec. 31, 2023 |
Dec. 31, 2022 |
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| Deferred tax assets: | ||
| Net operating loss carryforwards | $ 37,037 | $ 16,562 |
| Start-up and Organization Costs | 16,913 | 16,965 |
| Capitalized research and development credits | 10,943 | 17,922 |
| Intangibles | 6,703 | 22 |
| Stock-based compensation | 4,972 | 3,072 |
| Research and development credits | 4,842 | 4,595 |
| Operating lease obligations | 1,375 | 1,534 |
| Accrued expenses and reserves | 621 | 1,710 |
| Property and equipment | 233 | 173 |
| Other | 1 | 1 |
| Total deferred tax assets before valuation allowance | 83,640 | 62,556 |
| Valuation allowance | (82,440) | (61,200) |
| Total deferred tax assets | 1,200 | 1,356 |
| Deferred Tax Liabilities: | ||
| Operating lease right-of-use assets | (1,200) | (1,356) |
| Total deferred tax liabilities | (1,200) | (1,356) |
| Net deferred tax assets | $ 0 | $ 0 |
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- Definition Deferred Tax Assets, Leasing Arrangements No definition available.
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- Definition Deferred Tax Assets, Start-Up and Organizational Costs No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from in-process research and development cost acquired in business combination or from joint venture formation or both. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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