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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Operating revenues: |  |  |
Oil, gas, and NGL production revenues: | $ 32,534 | $ 30,958 | $ 26,548
Operating expenses: |  |  |
Oil and gas | 10,788 | 11,552 | 6,073
Oil and gas depreciation, depletion and amortization | 14,893 | 13,997 | 10,610
Impairment of oil and gas properties | 5,189 | 0 | 0
Water treatment plant | 1,978 | 1,878 | 1,793
Mineral holding costs | 921 | 486 | 85
General and administrative | 6,810 | 8,261 | 8,973
Impairment of corporate aircraft | 2,299 | 0 | 0
Total operating expenses | 42,878 | 36,174 | 27,534
Loss from operations | (10,344) | (5,216) | (986)
Other income and expenses: |  |  |
Realized gain (loss) on risk management activities | 21 | (1,974) | (156)
Unrealized gain (loss) on risk management activities | 1,070 | 1,126 | (1,725)
(Loss) gain on the sale of assets | (12) | 137 | 115
Equity loss in unconsolidated investment | (359) | (211) | 1,014
Gain on sale of marketable securities | 82 | 529 | 438
Miscellaneous income and (expenses) | 241 | (38) | (60)
Interest income | 9 | 40 | 112
Interest expense | (203) | (326) | (70)
Total other income and (expenses) | 849 | (717) | (332)
Income (loss) before income taxes and discontinued operations | (9,495) | (5,933) | (1,318)
Income taxes: |  |  |
Current (provision for) benefit from | (104) | 0 | 104
Deferred (provision for) benefit from | 148 | 3,755 | 1,756
Total income taxes | 44 | 3,755 | 1,860
(Loss) income from continuing operations | (9,451) | (2,178) | 542
Discontinued operations: |  |  |
Discontinued operations, net of taxes | 97 | 434 | 226
Impairment on discontinued operations, net of taxes | (1,891) | (3,063) | (1,540)
Total discontinued operations | (1,794) | (2,629) | (1,314)
Net (loss) | $ (11,245) | $ (4,807) | $ (772)
Net (loss) income per share basic and diluted |  |  |
Loss from continuing operations (in dollars per share) | $ (0.34) | $ (0.08) | $ 0.02
Income (loss) from discontinued operations (in dollars per share) | $ (0.07) | $ (0.10) | $ (0.05)
Net (loss) income per share (in dollars per share) | $ (0.41) | $ (0.18) | $ (0.03)
Weighted average shares outstanding |  |  |
Basic and Diluted (in shares) | 27,466,549 | 27,238,869 | 26,763,995
Diluted | 27,466,549 | 27,238,869 | 26,763,995

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