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STOCK-BASED COMPENSATION PLANS - Summary of stock-based compensation expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
STOCK-BASED COMPENSATION PLANS |  |  |  |
Total stock based compensation expense | $ 660 | $ 535 | $ 967 | $ 1,124
Cost of Revenue |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |
Total stock based compensation expense | 7 | 12 | 15 | 27
Sales and marketing expense |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |
Total stock based compensation expense | 69 | 55 | 130 | 114
General, and administrative |  |  |  |
STOCK-BASED COMPENSATION PLANS |  |  |  |
Total stock based compensation expense | $ 584 | $ 468 | $ 822 | $ 983

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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