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LEASES - Narrative (Details) | Mar. 31, 2021 | Dec. 31, 2020
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LEASES (Details) [Line Items] |  |
Operating lease, weighted average discount rate, percent | 8.00% | 9.00%
Minimum |  |
LEASES (Details) [Line Items] |  |
Operating lease, term of contract (in years) | 1 year |
Maximum |  |
LEASES (Details) [Line Items] |  |
Operating lease, term of contract (in years) | 10 years |
Building |  |
LEASES (Details) [Line Items] |  |
Operating lease, weighted average remaining lease term (in years) | 5 years | 6 years

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