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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Revenue: |  |  |  |
Oil | $ 1,677 | $ 2,934 | $ 2,541 | $ 5,231
Natural gas and liquids | 319 | 351 | 521 | 733
Total revenue | 1,996 | 3,285 | 3,062 | 5,964
Oil and gas operations: |  |  |  |
Production costs | 1,434 | 2,021 | 2,464 | 3,873
Depreciation, depletion and amortization | 864 | 2,055 | 1,646 | 4,929
Impairment of oil and gas properties | 2,611 | 3,208 | 9,568 | 22,448
General and administrative: |  |  |  |
Compensation and benefits, including directors | 172 | 676 | 311 | 1,530
Stock-based compensation | 34 | 109 | 68 | 224
Professional services | 541 | 274 | 768 | 540
Insurance, rent and other | 16 | 162 | 183 | 407
Total operating expenses | 5,672 | 8,505 | 15,008 | 33,951
Operating loss | (3,676) | (5,220) | (11,946) | (27,987)
Other income (expense): |  |  |  |
Realized gain (loss) on oil price risk derivatives | 380 | (25) | 1,262 | (139)
Change in unrealized gain (loss) on oil price risk derivatives | (887) | (272) | (1,460) | (335)
Gain on sale of assets | 100 |  | 100 | 16
Rental and other income, net of expenses | (48) | 10 | (79) | 50
Interest expense | (75) | (66) | (247) | (129)
Loss from continuing operations | (4,206) | (5,573) | (12,370) | (28,524)
Loss from discontinued operations | (10) | (707) | (2,448) | (1,459)
Net loss | (4,216) | (6,280) | (14,818) | (29,983)
Other comprehensive loss: |  |  |  |
Unrealized gain in marketable equity securities | 927 | 5 | 927 | 5
Comprehensive loss | (3,289) | (6,275) | (13,891) | (29,978)
Loss from continuing operations applicable to common shareholders: |  |  |  |
Loss from continuing operations | (4,206) | (5,573) | (12,370) | (28,524)
Accrued dividends related to Series A Convertible Preferred Stock | (62) |  | (96) |
Loss from continuing operations applicable to common shareholders | $ (4,268) | $ (5,573) | $ (12,466) | $ (28,524)
Earnings (loss) per share applicable to common shareholders (basic and diluted): |  |  |  |
Continuing operations (in dollars per share) | $ (0.89) | $ (1.19) | $ (2.63) | $ (6.10)
Discontinued operations (in dollars per share) |  | (0.15) | (0.52) | (0.31)
Total (in dollars per share) | $ (0.90) | $ (1.34) | $ (3.15) | $ (6.41)
Weighted average shares outstanding- basic and diluted (in shares) | 4,705,000 | 4,675,000 | 4,705,000 | 4,675,000

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- Definition A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.2(a),(b),(c),(d)) -URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section 45 -Paragraph 3 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=6488370&loc=d3e13550-115849 + Details
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- Definition Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The amount of expenses related to oil and gas producing activities. + References No definition available. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition Amount of unrealized gain (loss) arising from the change in fair value of price risk derivatives designated as cash flow hedging instruments recorded in accumulated other comprehensive income in the period, before taxes, to the extent that the cash flow hedge is determined to be effective. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). + References No definition available. + Details
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- Definition Amount of realized gain (loss) arising from the change in fair value of price risk derivatives designated as cash flow hedging instruments recorded in accumulated other comprehensive income in the period, before taxes, to the extent that the cash flow hedge is determined to be effective. + References No definition available. + Details
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