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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Revenues: |  |
Revenues | $ 18,347 | $ 12,075
Costs and expenses: |  |
General and administrative | 5,820 | 5,524
Depletion, depreciation, and amortization | 2,147 | 3,022
Impairment of assets | 4,376 | 5,710
Interest expense | 3 | 5
Gain on sale of asset | (1,336) | 0
Total costs and expenses | 23,373 | 24,447
Loss before equity in income (loss) of affiliates and income taxes | (5,026) | (12,372)
Equity in income (loss) of affiliates | 352 | (276)
Loss before income taxes | (4,674) | (12,648)
Income tax provision (benefit) | 3 | (231)
Net loss | (4,677) | (12,417)
Less: Net earnings (loss) attributable to non-controlling interests | 79 | (3)
Net loss attributable to Barnwell Industries, Inc. stockholders | $ (4,756) | $ (12,414)
Basic net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share) | $ (0.57) | $ (1.50)
Diluted net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share) | $ (0.57) | $ (1.50)
Weighted-average number of common shares outstanding: |  |
Basic (in shares) | 8,277,160 | 8,277,160
Diluted (in shares) | 8,277,160 | 8,277,160
Oil and natural gas |  |
Revenues: |  |
Revenues | $ 6,693 | $ 6,406
Costs and expenses: |  |
Costs and expenses | 4,850 | 5,213
Depletion, depreciation, and amortization | 1,747 | 2,680
Impairment of assets | 4,326 | 5,710
Contract drilling |  |
Revenues: |  |
Revenues | 10,994 | 5,349
Costs and expenses: |  |
Costs and expenses | 7,513 | 4,973
Depletion, depreciation, and amortization | 356 | 287
Sale of interest in leasehold land |  |
Revenues: |  |
Revenues | 325 | 165
Costs and expenses: |  |
Impairment of assets | 50 | 0
Gas processing and other |  |
Revenues: |  |
Revenues | 335 | 155
Costs and expenses: |  |
Depletion, depreciation, and amortization | $ 44 | $ 55

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