Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net (loss) income	$ (16,536)	$ 3,118
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Accretion of asset retirement obligations	43	20
Depreciation, depletion and amortization	15,382	11,954
Stock-based compensation	450	178
Share based payments	(610)
Deferred taxes	(3,191)	1,707
Loss (gain) on derivative financial instruments	11,156	(8,746)
Settlements of derivative financial instruments	(3,116)	1,516
Loss on abandoned property and equipment	170
Non-cash interest expense	2,477	581
Unrealized loss (gain) on warrants	152	(2,270)
Changes in operating assets and liabilities:
Accounts receivable	(131)	(2,110)
Prepaid expenses and other assets	(709)	(378)
Accounts payable and accrued expenses	4,310	7,398
Net cash provided by operating activities	9,847	12,968
Cash flows from investing activities
Acquisition of oil and gas properties	(1,605)	(1,563)
Development of oil and gas properties	(31,523)	(19,076)
Purchases of other property and equipment	(1,348)	(13)
Net cash used in investing activities	(34,476)	(20,652)
Cash flows from financing activities
Proceeds from borrowings and related party borrowings	264,565	9,000
Payments on borrowings and related party borrowings	(240,436)	(2,500)
Cost to issue equity		(1,000)
Net cash provided by financing activities	24,129	5,500
Net decrease in cash and cash equivalents	(500)	(2,184)
Cash and cash equivalents, beginning of the period	2,538	6,068
Cash and cash equivalents, end of the period	2,038	3,884
Supplemental information:
Cash paid for taxes	1,147
Cash paid for interest	3,970	912
Non-cash investing and financing activities:
Asset retirement obligation	32	(33)
Increase (decrease) in liabilities for capital expenditures	$ 406	$ (5,561)