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STOCK-BASED COMPENSATION PLANS - Summary of stock-based compensation expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Total stock based compensation expense	$ 1,630	$ 2,681
Excess tax benefit from share based compensation	200	1,700
Cost of revenue
Total stock based compensation expense	56	37
Sales and marketing expense
Total stock based compensation expense	155	424
General and administrative
Total stock based compensation expense	$ 1,419	$ 2,220

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

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-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Represents the excess tax benefit from share based compensation.

+ References

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