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LEASES - Lease Costs (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Lease Cost:    
Operating lease (including related operating costs) $ 76 $ 222
Short-term property leases 59 188
Total lease costs $ 135 $ 410
Supplemental Information:    
Weighted-average remaining lease term - operating leases (in years) 1 year 1 year
Weighted-average discount rate - operating leases 12.00% 12.00%