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LEASES - Narrative (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 14, 2019 | Jun. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 17, 2019 | Apr. 04, 2011
Leases |  |  |  |  |  |  |
Impairment of operating lease right of use asset |  |  |  | $ 223 |  |  |
Total lease cost |  |  | $ 1,912 | 1,884 |  |  |
New York |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |
Lease term |  |  |  |  |  |  | 7 years
Impairment of operating lease right of use asset |  | $ 223 |  |  |  |  |
Sublease income |  |  | $ 1,223 | $ 72 | $ 0 |  |
Singapore |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |
Lease term |  |  |  |  |  | 3 years |
Period from July 26, 2019 to September 29, 2025 | New York |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |
Free base rental period of the sublease | 4 months 15 days |  |  |  |  |  |
Period from December 10, 2019 to September 29, 2025 | New York |  |  |  |  |  |  |
Leases |  |  |  |  |  |  |
Monthly base sublease income | $ 102 |  |  |  |  |  |

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- Definition Amount of monthly base sublease income + References No definition available. + Details
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- Definition Amount of lease cost recognized by lessee for lease contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Term of lessee's operating lease, 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 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Amount of loss from impairment of right-of-use asset from operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 25 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77888369&loc=SL77918431-209957 + Details
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- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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