SUBSEQUENT EVENTS (FY) (Details)
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Jan. 27, 2021
Claim
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Jan. 13, 2021
USD ($)
$ / shares
shares
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Mar. 31, 2021
$ / shares
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Feb. 18, 2021
USD ($)
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Dec. 31, 2020
$ / shares
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Jun. 10, 2019
USD ($)
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| Sponsor [Member] | Promissory Note [Member] |
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| Subsequent Event [Abstract] |
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| Unsecured convertible promissory note |
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$ 237,470
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| Sponsor [Member] | Promissory Note [Member] | Maximum [Member] |
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| Subsequent Event [Abstract] |
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| Unsecured convertible promissory note |
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$ 750,000
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| Class A Ordinary Shares [Member] |
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| Subsequent Event [Abstract] |
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| Share price (in dollars per share) | $ / shares |
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$ 18.00
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$ 18.00
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| Subsequent Event [Member] | Pending Litigation [Member] |
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| Subsequent Event [Abstract] |
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| Number of actions filed | Claim |
2
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| Subsequent Event [Member] | Pending Litigation [Member] | Brait v. Silver Spike Acquisition Corp. [Member] |
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| Subsequent Event [Abstract] |
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| Number of actions filed | Claim |
1
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| Subsequent Event [Member] | Pending Litigation [Member] | Stout v. Silver Spike Acquisition Corp. [Member] |
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| Subsequent Event [Abstract] |
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| Number of actions filed | Claim |
1
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| Subsequent Event [Member] | Sponsor [Member] | Promissory Note [Member] | Maximum [Member] |
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| Subsequent Event [Abstract] |
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| Unsecured convertible promissory note |
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$ 750,000
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| Subsequent Event [Member] | Class A Ordinary Shares [Member] |
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| Subsequent Event [Abstract] |
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| Number of shares redeemed (in shares) | shares |
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1,425
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| Value of shares redeemed |
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$ 14,489
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| Share price (in dollars per share) | $ / shares |
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$ 10.17
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