CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income (loss)	$ 3,811	$ (576)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Accretion of discount on available-for-sale debt securities	(14)	(13)
Amortization of deferred offering costs	51	52
Depreciation, depletion and amortization	10,105	6,129
Change in fair value of derivative financial instruments	(1,087)	3,643
Stock option expense	383	358
Deferred tax expense	17	5
Change in assets and liabilities:
Decrease (increase) in accounts receivable-trade	515	(623)
Increase in other assets	(724)	(879)
Increase (decrease) in accounts payable and accruals	692	(337)
Decrease in other long-term liabilities	(858)	(92)
Net cash provided by operating activities	12,891	7,667
Cash flows from investing activities:
Purchase, exploration and development of oil and gas properties	(26,012)	(5,742)
Purchase of property and equipment	(293)	(3,150)
Net cash used in investing activities	(26,305)	(8,892)
Cash flows from financing activities:
Proceeds from line of credit	10,000
Payments on debt and debentures	(38)	(734)
Issuance of common stock, net	37	58
Net cash provided by (used in) financing activities	9,999	(676)
Net decrease in cash and cash equivalents	(3,415)	(1,901)
Cash and cash equivalents at beginning of period	10,614	11,092
Cash and cash equivalents at end of period	7,199	9,191
Supplemental disclosure of cash flow information
Cash paid for interest, net of amounts capitalized	738	517
Noncash investing and financing activities
Accrued preferred stock dividend	$ 3	$ 3