SUMMARY OF SIGNIFCANT ACCOUNTING POLICIES - Schedule of Future Minimum Payments Related to Leases (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases
2019	$ 163
2020	652
2021	622
2022	445
2023	0
Thereafter	0
Total future minimum lease payments	1,882
Less: imputed interest	(105)
Total lease liabilities	1,777
Current portion	(596)
Non-current portion	1,181
Finance Leases
2019	7,954
2020	9,800
2021	0
2022	0
2023	0
Thereafter	0
Total future minimum lease payments	17,754
Less: imputed interest	(192)
Total lease liabilities	17,562
Current portion	(17,562)
Non-current portion	$ 0