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REVENUE RECOGNITION - Deferred contract acquisition costs (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Minimum |  |
Capitalized Contract Cost [Line Items] |  |
Deferred contract acquisition cost recognition period | 12 months |
Maximum |  |
Capitalized Contract Cost [Line Items] |  |
Deferred contract acquisition cost recognition period | 18 months |
Prepaid expenses and other current assets |  |
Capitalized Contract Cost [Line Items] |  |
Deferred contract acquisition costs | $ 973 | $ 1,009
Other non-current assets |  |
Capitalized Contract Cost [Line Items] |  |
Deferred contract acquisition costs | $ 5,957 | $ 5,315

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- Definition Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131251-203054 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The carrying amount of deferred costs. + References No definition available. + Details
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