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STOCK-BASED COMPENSATION PLANS - Summary of stock-based compensation expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Total stock based compensation expense | $ 578 | $ 533 | $ 1,702 | $ 1,042
Cost of Revenue |  |  |  |
Total stock based compensation expense | 13 | 12 | 40 | 42
Sales and marketing expense. |  |  |  |
Total stock based compensation expense | 16 | 48 | 130 | 78
General and administrative |  |  |  |
Total stock based compensation expense | $ 549 | $ 473 | $ 1,532 | $ 922

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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