OPERATING LEASES - Narrative (Details)		12 Months Ended
Aug. 13, 2016	Dec. 31, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)
Leases, Operating [Abstract]
Lease expiration period	7 years
Area of facility \| ft²		1,600
Monthly lease expense		$ 7,800
Rent expense		$ 404,000	$ 380,000

Amount of operating lease expense. Excludes sublease income.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977

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