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DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Q1) (Details) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Sep. 17, 2020 USD ($) $ / shares shares | Mar. 31, 2021 USD ($) Business | Dec. 31, 2020 USD ($) shares
Description of Organization and Business Operations [Abstract] |  |  |
Gross proceeds from initial public offering | $ | $ 230,000,000 |  | $ 225,796,000
Net proceeds placed in trust account | $ | $ 230,000,000 | $ 230,090,636 | $ 230,053,249
Net proceeds from Initial Public Offering and Private Placement per unit (in dollars per share) | $ 10.00 |  |
Net tangible asset threshold for redeeming Public Shares | $ |  | $ 5,000,001 |
Percentage of Public Shares that can be redeemed without prior consent |  | 15.00% |
Percentage of Public Shares that would not be redeemed if Business Combination is not completed within Initial Combination Period |  | 100.00% |
Period to redeem Public Shares if Business Combination is not completed within Initial Combination Period |  | 10 days |
Minimum [Member] |  |  |
Description of Organization and Business Operations [Abstract] |  |  |
Number of operating businesses included in initial Business Combination | Business |  | 1 |
Fair market value as percentage of net assets held in Trust Account included in initial Business Combination |  | 80.00% |
Post-transaction ownership percentage of the target business |  | 50.00% |
Maximum [Member] |  |  |
Description of Organization and Business Operations [Abstract] |  |  |
Net proceeds from Initial Public Offering and Private Placement per unit (in dollars per share) | $ 10.00 |  |
Interest on Trust Account that can be held to pay dissolution expenses | $ | $ 100,000 |  |
Public Shares [Member] |  |  |
Description of Organization and Business Operations [Abstract] |  |  |
Units issued (in shares) | shares |  |  | 23,000,000
Private Placement Warrant [Member] |  |  |
Description of Organization and Business Operations [Abstract] |  |  |
Share price (in dollars per share) | $ 1.00 |  |
Warrants issued (in shares) | shares | 6,600,000 |  |
Gross proceeds from issuance of warrants | $ | $ 6,600,000 |  |
Initial Public Offering [Member] |  |  |
Description of Organization and Business Operations [Abstract] |  |  |
Net proceeds placed in trust account | $ | $ 230,000,000 |  |
Net proceeds from Initial Public Offering and Private Placement per unit (in dollars per share) | $ 10.00 |  |
Initial Public Offering [Member] | Public Shares [Member] |  |  |
Description of Organization and Business Operations [Abstract] |  |  |
Units issued (in shares) | shares | 23,000,000 |  |
Share price (in dollars per share) | $ 10.00 |  |
Redemption price (in dollars per share) | $ 10.00 |  |
Over-Allotment Option [Member] | Public Shares [Member] |  |  |
Description of Organization and Business Operations [Abstract] |  |  |
Units issued (in shares) | shares | 3,000,000 |  |
Share price (in dollars per share) | $ 10.00 |  |

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- Definition Fair market value as a percentage of the net assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on the income earned on the Trust Account) at the time of the agreement to enter into the initial Business Combination. + References No definition available. + Details
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