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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Cash flows from operating activities:      
Net (loss) $ (11,245) $ (4,807) $ (772)
Loss from discontinued operations includes non-cash impairment of $2,955, $3,063 and $1,540 1,794 2,629 1,314
(Loss) income from continuing operations (9,451) (2,178) 542
Adjustments to reconcile net (loss) income to net cash provided by operations      
Depreciation, depletion & amortization 15,457 14,593 11,184
Change in fair value of commodity price risk management activities, net (1,070) (1,126) 1,725
Accretion of discount on treasury investment 0 0 (78)
Impairment of oil and gas properties 5,189 0 0
Impairment of corporate aircraft 2,299 0 0
Gain on sale of marketable securities (82) (529) (438)
Equity (gain)/loss from Standard Steam 359 211 (1,014)
Net change in deferred income taxes (60) (3,990) (1,533)
Loss (gain) on the sale of assets 12 (137) (115)
Noncash compensation 518 1,604 1,710
Noncash services 69 6 66
Net changes in assets and liabilities      
Accounts receivable 315 (1,493) (174)
Income tax receivable 113 (9) 249
Other current assets 230 148 (386)
Accounts payable (476) (3,368) (498)
Accrued compensation expense (336) (1,194) 6
Other liabilities 53 29 149
Net cash provided by operating activities 13,139 2,567 11,395
Cash flows from investing activities:      
Net redemption of treasury investments 0 17,843 4,293
Cash distributions from Standard Steam 0 0 1,138
Acquisition & development of oil & gas properties (42,311) (50,265) (45,933)
Acquisition & development of mining properties 0 (221) (123)
Mining property option payment 0 354 1,000
Acquisition of property and equipment (102) (42) (624)
Proceeds from sale of oil and gas properties 21,475 13,574 0
Proceeds from sale of marketable securities 101 846 602
Proceeds from sale of property and equipment 76 147 142
Net change in restricted investments (116) (11) (330)
Net cash (used in) investing activities: (20,877) (17,775) (39,835)
Cash flows financing activities:      
Issuance of common stock 51 (146) 294
Proceeds from new debt 10,000 33,069 0
Repayments of debt (12,484) (11,365) (200)
Net cash (used in) provided by financing activities (2,433) 21,558 94
Net cash provided by operating activities of discontinued operations 122 767 779
Net cash used in investing activities of discontinued operations 0 (55) (24)
Net increase (decrease) in cash and cash equivalents (10,049) 7,062 (27,591)
Cash and cash equivalents at beginning of period 12,874 5,812 33,403
Cash and cash equivalents at end of period 2,825 12,874 5,812
Supplemental disclosures:      
Income tax received 0 0 (353)
Interest paid 179 290 22
Non-cash investing and financing activities:      
Unrealized gain 101 78 642
Acquisition and development of oil and gas properties through accounts payable 6,202 2,092 8,983
Acquisition and development of oil and gas through asset retirement obligations $ 142 $ 186 $ 75