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Fair Value Measurements - Schedule of company's assets fair value (Q3) (Details) | Sep. 30, 2021 USD ($)
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Assets: |
Marketable Securities held in Trust Account | $ 345,030,985
Liabilities: |
Forward purchase agreement liabilities | (8,991,000)
Warrant liabilities | (14,180,333)
Total | 321,859,652
Quoted Prices In Active Markets (Level 1) [Member] |
Assets: |
Marketable Securities held in Trust Account | 345,030,985
Liabilities: |
Forward purchase agreement liabilities | 0
Warrant liabilities | (9,315,000)
Total | 335,715,985
Significant Other Observable Inputs (Level 2) [Member] |
Assets: |
Marketable Securities held in Trust Account | 0
Liabilities: |
Forward purchase agreement liabilities | 0
Warrant liabilities | 0
Total | 0
Significant Other Unobservable Inputs (Level 3) [Member] |
Assets: |
Marketable Securities held in Trust Account | 0
Liabilities: |
Forward purchase agreement liabilities | (8,991,000)
Warrant liabilities | (4,865,333)
Total | $ (13,856,333)

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- Definition The amount of cash, securities, or other assets held by a third-party trustee pursuant to the terms of an agreement which assets are available to be used by beneficiaries to that agreement only within the specific terms thereof and which agreement is expected to terminate within one year of the balance sheet date (or operating cycle, if longer) at which time the assets held-in-trust will be released or forfeited. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(b)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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