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GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Intangible Assets and Goodwill [Line Items] |  |  |
Amortization of intangibles | $ 4,359 | $ 5,213 | $ 5,267
Intangible Assets, Net[Abstract] |  |  |
Total intangible assets, Gross | 57,847 | 61,177 |
Accumulated amortization | (45,341) | (44,312) |
Total Finite Lived Intangible Assets, Net | 11,245 |  |
Total Intangible Assets, Net | $ 12,506 | 16,865 |
Minimum [Member] |  |  |
Intangible Assets and Goodwill [Line Items] |  |  |
Useful life (in years) | 2 years |  |
Maximum [Member] |  |  |
Intangible Assets and Goodwill [Line Items] |  |  |
Useful life (in years) | 12 years |  |
Developed technology |  |  |
Intangible Assets, Net[Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | $ 37,960 | 37,960 |
Accumulated amortization | (29,126) | (25,933) |
Total Finite Lived Intangible Assets, Net | 8,834 | 12,027 |
Customer relationships [Member] |  |  |
Intangible Assets, Net[Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 16,700 | 20,030 |
Accumulated amortization | (15,687) | (18,098) |
Total Finite Lived Intangible Assets, Net | 1,013 | 1,932 |
Technology licenses [Member] |  |  |
Intangible Assets, Net[Abstract] |  |  |
Finite-Lived Intangible Assets, Gross | 1,926 | 1,926 |
Accumulated amortization | (528) | (281) |
Total Finite Lived Intangible Assets, Net | 1,398 | 1,645 |
Domain name |  |  |
Intangible Assets, Net[Abstract] |  |  |
Indefinite-lived intangible assets | 1,261 | 1,261 |
Accumulated amortization | $ 0 | $ 0 |

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- Definition Intangible Assets and Goodwill [Line Items] + References No definition available. + Details
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- Definition Intangible Assets, Gross + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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