WARRANT LIABILITY (Q1) (Details) - $ / shares
|
3 Months Ended |
12 Months Ended |
Mar. 31, 2021 |
Dec. 31, 2020 |
| Warrants [Abstract] |
|
|
| Period to exercise warrants after business combination |
30 days
|
30 days
|
| Period to exercise warrants after public offerings |
12 months
|
12 months
|
| Expiration period of warrants |
5 years
|
5 years
|
| Number of days to file registration statement |
15 days
|
15 days
|
| Period for registration statement to become effective |
60 days
|
60 days
|
| Warrant redemption price (in dollars per share) |
$ 0.01
|
$ 0.01
|
| Notice period to redeem warrants |
30 days
|
30 days
|
| Number of trading days |
20 days
|
20 days
|
| Trading day threshold period |
30 days
|
30 days
|
| Limitation period to transfer, assign or sell warrants |
30 days
|
30 days
|
| Class A Ordinary Shares [Member] |
|
|
| Warrants [Abstract] |
|
|
| Share price (in dollars per share) |
$ 18.00
|
$ 18.00
|
| Percentage of exercise price of public warrants is adjusted higher than the market value of newly issued price |
115.00%
|
115.00%
|
| Percentage of redemption triggered price is adjusted higher than the market value of newly issued price |
180.00%
|
180.00%
|
| Class A Ordinary Shares [Member] | Minimum [Member] |
|
|
| Warrants [Abstract] |
|
|
| Share price (in dollars per share) |
$ 12.00
|
$ 12.00
|
| Percentage of aggregate gross proceeds of issuance available for funding of business combination |
60.00%
|
60.00%
|
| Class A Ordinary Shares [Member] | Maximum [Member] |
|
|
| Warrants [Abstract] |
|
|
| Additional shares issued with the closing of business combination (in dollars per share) |
$ 9.20
|
$ 9.20
|