INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Net Operating Loss (NOLs) and Tax Credit Carryforwards	$ 91,392	$ 96,700
Share Based Compensation	190	146
Accrued Interest	1,061	637
Allowance for Doubtful Accounts	1,117	1,279
Crude Oil and Natural Gas Properties and Other Properties	(11,447)	16,904
Interest Carryforwards	49,011	40,614
Derivative Instruments	13,196	(31,981)
Other	(112)	(145)
Total Net Deferred Tax Assets (Liabilities) Before Valuation Allowance	144,408	124,154
Valuation Allowance	(144,198)	(123,734)
Total Net Deferred Tax Assets	$ 210	$ 420