Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (2,253)	$ (5,733)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Deferred tax expense (benefit)	106	(189)
Depreciation, depletion and amortization	12,528	12,958
Accretion of asset retirement obligation	240	1,100
Share-based compensation expense	593	825
Amortization costs and other	402	450
Non-cash interest expense on PIK Notes	2,961	11,179
Payments to settle asset retirement obligations	(75)	(1,357)
Changes in working capital accounts:
Revenue receivable	7,480	689
Joint interest billing receivable	4,078	2,239
Accounts payable and accrued liabilities	(24,104)	(8,368)
Advances from co-owners	(1,117)	2,215
Deposit for surety bonds	(4,000)	0
Other	242	(2,314)
Net cash (used in) provided by operating activities	(2,919)	13,694
Cash flows used in investing activities:
Investment in oil and gas properties	(9,785)	(21,661)
Investment in other property and equipment	(136)	(37)
Sale of oil and gas properties	(2,428)	2,207
Sale of unevaluated oil and gas properties	2,928	0
Net cash used in investing activities	(9,421)	(19,491)
Cash flows provided by (used in) financing activities:
Net proceeds from share based compensation	43	32
Deferred financing costs	(55)	(125)
Redemption of 2017 Notes	0	(22,650)
Costs incurred to redeem 2021 Notes	(11)	0
Proceeds from borrowings	2,500	20,000
Net cash provided by (used in) financing activities	2,477	(2,743)
Net decrease in cash and cash equivalents	(9,863)	(8,540)
Cash and cash equivalents, beginning of period	15,655	28,312
Cash and cash equivalents, end of period	5,792	19,772
Cash paid during the period for:
Interest	$ 3,304	$ 3,743