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LEASES - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
agreement
Sep. 30, 2019
USD ($)
agreement
Lessee, Lease, Description [Line Items]    
Office space lease agreements | agreement 18 18
Operating rent expense $ 409 $ 1,223
Lease liabilities 7,475 7,475
Current operating lease liability 1,628 1,628
Right-of-use asset $ 6,895 $ 6,895
Incremental borrowing rate 9.00% 9.00%
Weighted average remaining lease term for operating lease 6 years 6 years
Minimum    
Lessee, Lease, Description [Line Items]    
Operating lease, term of contract 1 year 1 year
Maximum    
Lessee, Lease, Description [Line Items]    
Operating lease, term of contract 10 years 10 years