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RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS, Balance Sheet (FY) (Details) - USD ($) | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Sep. 17, 2020 | Jun. 22, 2020
--- | --- | --- | --- | --- | ---
Balance Sheet [Abstract] |  |  |  |  |
Warrant Liability | $ 18,462,000 | $ 23,530,000 | $ 16,109,000 | $ 16,290,000 |
Total Liabilities | 29,968,217 | 31,895,328 | 24,210,692 | 24,869,943 |
Class A Common Stock Subject to Possible Redemption | 196,236,140 | 194,719,000 | 202,537,030 | 202,384,370 |
Additional Paid-in Capital | 11,729,141 | 13,246,266 | 5,428,314 | 5,580,973 |
Accumulated Deficit | (6,730,049) | (8,247,187) | (429,155) | (581,818) |
Total Stockholders' Equity | 5,000,005 | 5,000,007 | 5,000,009 | 5,000,006 | $ 0
Class A Common Stock [Member] |  |  |  |  |
Balance Sheet [Abstract] |  |  |  |  |
Class A common stock | $ 338 | 353 | 275 | 276 |
As Previously Reported [Member] |  |  |  |  |
Balance Sheet [Abstract] |  |  |  |  |
Warrant Liability |  | 0 | 0 | 0 |
Total Liabilities |  | 8,365,328 | 8,101,692 | 8,579,943 |
Class A Common Stock Subject to Possible Redemption |  | 218,249,000 | 218,646,030 | 218,646,370 |
Additional Paid-in Capital |  | 5,426,501 | 5,029,475 | 5,001,136 |
Accumulated Deficit |  | (427,187) | (30,155) | (1,818) |
Total Stockholders' Equity |  | 5,000,007 | 5,000,009 | 5,000,006 |
As Previously Reported [Member] | Class A Common Stock [Member] |  |  |  |  |
Balance Sheet [Abstract] |  |  |  |  |
Class A common stock |  | 118 | 114 | 113 |
Accounting for Warrants [Member] | Adjustments [Member] |  |  |  |  |
Balance Sheet [Abstract] |  |  |  |  |
Warrant Liability |  | 23,530,000 | 16,109,000 | 16,290,000 |
Total Liabilities |  | 23,530,000 | 16,109,000 | 16,290,000 |
Class A Common Stock Subject to Possible Redemption |  | (23,530,000) | (16,109,000) | (16,290,000) |
Additional Paid-in Capital |  | 7,819,765 | 398,839 | 579,837 |
Accumulated Deficit |  | (7,820,000) | (399,000) | (580,000) |
Total Stockholders' Equity |  | 0 | 0 | 0 |
Accounting for Warrants [Member] | Adjustments [Member] | Class A Common Stock [Member] |  |  |  |  |
Balance Sheet [Abstract] |  |  |  |  |
Class A common stock |  | $ 235 | $ 161 | $ 163 |

X
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