v3.21.2

NET LOSS PER SHARE - Reconciliation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net loss	$ (2,197)	$ (3,756)	$ (10,379)	$ (4,539)	$ (9,447)	$ (4,945)	$ (16,332)	$ (18,931)
Weighted average common stock - basic (in shares)	19,291,374			19,112,797			19,256,128	17,700,429
Weighted average common stock - diluted (in shares)	19,291,374			19,112,797			19,256,128	17,700,429
Net loss per share - basic (in dollars per share)	$ (0.11)			$ (0.24)			$ (0.85)	$ (1.07)
Net loss per share - diluted (in dollars per share)	$ (0.11)			$ (0.24)			$ (0.85)	$ (1.07)

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1448-109256

+ Details

Name:	us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration