SUPPLEMENTAL DISCLOSURES ABOUT NATURAL GAS PRODUCING ACTIVITIES - Results of Operations for Natural Gas & Condensate Producing Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Extractive Industries [Abstract]
Natural gas sales	$ 28,774	$ 4,423	$ 503
Operating costs	14,923	11,251	1,668
Depreciation, depletion and amortization	19,736	1,228	115
Impairment charge	0	2,699	0
Total operating costs and expenses	34,659	15,178	1,783
Results of operations	$ (5,885)	$ (10,755)	$ (1,280)