OTHER SUPPLEMENTAL INFORMATION (Schedule of Accounts Payable and Accrued Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Jun. 01, 2018	May 31, 2018
Other Supplemental Information Disclosure [Abstract]
San Juan royalties	$ 5,000	$ 5,000
Lease operating expenses	4,894	10,035
Due to contract operator	4,809
General and administrative expenses	2,550	3,321
Production and ad valorem taxes	2,453	4,680
Current portion of ARO	1,302	2,077
Costs for additions to oil and natural gas properties	287	419
Other	2,229	614
Total	$ 23,524	$ 26,146	$ 36,787	$ 34,922