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EARNINGS (LOSS) PER COMMON SHARE (Tables) | 3 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Reconciliations between net earnings (loss) attributable to the entity's stockholders and common shares outstanding of the basic and diluted net earnings (loss) per share computations | Reconciliations between net earnings (loss) attributable to Barnwell stockholders and common shares outstanding of the basic and diluted net earnings (loss) per share computations are detailed in the following tables:
| Three months ended December 31, 2020
| Net Earnings (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic net earnings per share | $ | 584,000 |  |  | 8,277,160 |  |  | $ | 0.07 |
Effect of dilutive securities - |  |  |  |  |
common stock options | — |  |  | — |  |  |
Diluted net earnings per share | $ | 584,000 |  |  | 8,277,160 |  |  | $ | 0.07 |
| Three months ended December 31, 2019
| Net Loss (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic net loss per share | $ | (414,000) |  |  | 8,277,160 |  |  | $ | (0.05) |
Effect of dilutive securities - |  |  |  |  |
common stock options | — |  |  | — |  |  |
Diluted net loss per share | $ | (414,000) |  |  | 8,277,160 |  |  | $ | (0.05) |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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