Present value of lessee's discounted obligation for lease payments from finance lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

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

FINANCE LEASE - Additional Information (Details) - USD ($) $ in Thousands	Mar. 11, 2021	Sep. 30, 2021	Dec. 31, 2020
Leases [Line Items]
Right of use asset at the lease commencement date		$ 1,369	$ 0
Equipment [Member]
Leases [Line Items]
Right of use asset at the lease commencement date	$ 1,400
Finance lease obligation	$ 1,200
Lease end date	Aug. 31, 2022