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LEASES - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Operating Leased Assets [Line Items]          
Operating lease right of use asset $ 474   $ 474   $ 662
Current portion of operating lease liability 315   315   289
Operating lease, liability, noncurrent 229   229   $ 469
Total lease expense $ 158 $ 152 $ 474 $ 485  
Minimum          
Operating Leased Assets [Line Items]          
Term of contract 1 year   1 year    
Maximum          
Operating Leased Assets [Line Items]          
Term of contract 4 years   4 years    
Renewal term 5 years   5 years