The amount for notes payable (written promise to pay), due to related parties.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.17)
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Name:	us-gaap_NotesPayableRelatedPartiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

RELATED PARTY TRANSACTIONS, Promissory Note (Q1) (Details) - USD ($)	3 Months Ended		7 Months Ended	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Feb. 18, 2021	Jun. 10, 2019
Related Party Transactions [Abstract]
Amount drawn	$ 200,000	$ 0	$ 237,470	$ 0
Sponsor [Member] \| Promissory Note [Member]
Related Party Transactions [Abstract]
Aggregate principal amount of note						$ 237,470
Amount drawn	$ 200,000
Sponsor [Member] \| Promissory Note [Member] \| Maximum [Member]
Related Party Transactions [Abstract]
Aggregate principal amount of note					$ 750,000