SUBSEQUENT EVENTS - Small Business Administration Loan (Details) - Subsequent event - Paycheck Protection Program	May 12, 2021 USD ($)
Principal amount forgiven	$ 1,317,000
Interest amount forgiven	$ 13,207

Decrease for amounts of indebtedness forgiven by the holder of the debt instrument.

Reference 1: 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.(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

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