FAIR VALUE MEASUREMENTS - Summary of the Valuation of the Company's Financial Assets and Liabilities that were Accounted for at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets (Liabilities)
Derivative liability	$ (4,314)
Total	(4,314)	$ 3,930
Fair value on a recurring basis
Assets (Liabilities)
Contingent consideration related to business combination	(20,963)
Total	(25,277)	3,930
Fair value on a recurring basis | Natural gas basis differential swaps
Assets (Liabilities)
Derivative liability	(4,314)	3,930
Fair value on a recurring basis | Level 1
Assets (Liabilities)
Contingent consideration related to business combination	0
Total	0	0
Fair value on a recurring basis | Level 1 | Natural gas basis differential swaps
Assets (Liabilities)
Derivative liability	0	0
Fair value on a recurring basis | Level 2
Assets (Liabilities)
Contingent consideration related to business combination	0
Total	(4,314)	3,930
Fair value on a recurring basis | Level 2 | Natural gas basis differential swaps
Assets (Liabilities)
Derivative liability	(4,314)	3,930
Fair value on a recurring basis | Level 3
Assets (Liabilities)
Contingent consideration related to business combination	(20,963)
Total	(20,963)	0
Fair value on a recurring basis | Level 3 | Natural gas basis differential swaps
Assets (Liabilities)
Derivative liability	$ 0	$ 0