Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net loss	$ (5,733)	$ (60,501)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Deferred tax (benefit) expense	(189)	561
Depreciation, depletion and amortization	12,958	17,331
Ceiling test writedown	0	31,639
Accretion of asset retirement obligation	1,100	1,226
Share-based compensation expense	825	925
Amortization costs and other	450	810
Non-cash interest expense on PIK Notes	11,179	0
Payments to settle asset retirement obligations	(1,357)	(2,515)
Costs incurred to issue 2021 Notes	0	4,808
Changes in working capital accounts:
Revenue receivable	689	24
Joint interest billing receivable	2,239	30,814
Accounts payable and accrued liabilities	(8,368)	(31,260)
Advances from co-owners	2,215	(15,541)
Other	(2,314)	(4,387)
Net cash provided by (used in) operating activities	13,694	(26,066)
Cash flows (used in) provided by investing activities:
Investment in oil and gas properties	(21,661)	(18,166)
Investment in other property and equipment	(37)	(28)
Sale of oil and gas properties	2,207	24,909
Net cash (used in) provided by investing activities	(19,491)	6,715
Cash flows used in financing activities:
Net proceeds from share based compensation	32	52
Deferred financing costs	(125)	(100)
Payment of preferred stock dividend	0	(1,284)
Redemption of 2017 Notes	(22,650)	(53,626)
Costs incurred to issue 2021 Notes	0	(4,808)
Proceeds from borrowings	20,000	0
Net cash used in financing activities	(2,743)	(59,766)
Net decrease in cash and cash equivalents	(8,540)	(79,117)
Cash and cash equivalents, beginning of period	28,312	148,013
Cash and cash equivalents, end of period	19,772	68,896
Cash paid during the period for:
Interest	$ 3,743	$ 16,783