RELATED PARTY TRANSACTIONS, Related Party Loans (Q3) (Details) - USD ($)	7 Months Ended	9 Months Ended
Dec. 31, 2019	Sep. 30, 2020	Aug. 12, 2019
Related Party Transactions [Abstract]
Share price (in dollars per share)			$ 1.00
Sponsor, Affiliate of Sponsor, or Certain of the Company's Officers and Directors [Member] \| Working Capital Loans [Member]
Related Party Transactions [Abstract]
Amount of related party transaction	$ 1,500,000	$ 1,500,000
Share price (in dollars per share)	$ 1.00	$ 1.00

Amount of transactions with related party during the financial reporting period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-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 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Name:	us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration