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LEASES- Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lessee Lease Description [Line Items]      
Operating lease description The Company used the incremental borrowing rate on January 1, 2019 for operating leases that commenced prior to that date. Current lease agreements do not contain any residual value guarantees or material restrictive covenants. As of December 31, 2019, the Company did not have any finance leases and no additional operating leases that have not yet commenced.    
Operating lease, option to extend true    
Operating lease, right-of-use asset $ 8,500    
Operating lease liabilities current 1,600    
Long-term operating lease liabilities 6,900    
Operating lease cost $ 1,855 $ 1,700 $ 972,000
Minimum [Member]      
Lessee Lease Description [Line Items]      
Operating leases remaining term 1 year    
Maximum [Member]      
Lessee Lease Description [Line Items]      
Operating leases remaining term 9 years