Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net (loss) income	$ 19,536	$ (18,907)	$ 13,663
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation, depletion and amortization	14,197	28,202	20,520
Accretion of asset retirement obligations	54	108	84
Settlement of asset retirement obligations		(179)	(79)
Loss (gain) on sale of oil and gas properties	201	326	(512)
Total loss on derivative contracts, net	(9,496)	38,398	16,125
Operating portion of net cash received (paid) in settlement of derivative contracts		9,956	(9,267)
Stock-based compensation		4,473	4,013
Deferred income taxes		153	(53)
Amortization of deferred financing costs	100	215	143
Changes in assets and liabilities:
(Increase) decrease in accounts receivable		(1,257)	4,475
(Increase) decrease in prepaid expenses and other current assets		(537)	(992)
Increase (decrease) in accounts payable and accrued expenses		(5,222)	(17,287)
Increase (decrease) in revenues and royalties payable		(3,845)	8,437
Increase in advances		3,400	14,159
Net cash provided by operating activities		55,284	53,429
Cash flows from investing activities:
Additions to oil and gas properties		(79,760)	(68,516)
Additions to office and other equipment		(202)	(53)
Proceeds from sales of oil and gas properties		2	210
Net cash used in investing activities		(79,960)	(68,359)
Cash flows from financing activities:
Proceeds from borrowings		128,087	25,000
Repayments of borrowings		(96,915)	(27,500)
Cash paid related to the exchange and cancellation of Class A Common Stock		(661)	(1,116)
Cash paid for finance leases	(100)	(237)	0
Deferred financing costs		(189)	(213)
Net cash provided by (used in) financing activities		30,085	(3,829)
Net increase (decrease) in cash		5,409	(18,759)
Cash at beginning of period		376	22,955
Cash at end of period	$ 5,785	5,785	4,196
Cash paid for:
Interest		2,760	986
Non-cash investing and financing activities:
Accrued capital expenditures		16,714	25,791
Lease asset additions - ASC 842		1,573
Asset retirement obligations		$ 23	$ (141)

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Amount of cash outflow from the acquisition of or improvements to long-lived, physical assets used to produce goods and services and not intended for resale, classified as other.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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