SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND ESTIMATES - Summary Of Accrued Liabilities (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Accrued drilling, completion and facilities costs	[1]	$ 448	$ 5,021
Drilling advances		1,228	1,328
Accrued production expenses	[1]	718	3,326
Other accrued liabilities	[1]	8,209	3,885
Short-term operating lease liabilities		171	412
Total accrued liabilities		$ 10,774	$ 13,972

[1] Prepetition accrued liabilities are classified as liabilities subject to compromise on our condensed consolidated balance sheets (see below).