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NET LOSS PER COMMON SHARE | 6 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
LOSS PER COMMON SHARE | NET LOSS PER COMMON SHARE Basic loss per share is computed using the weighted-average number of common shares outstanding for the period. Diluted loss per share is calculated using the treasury stock method to reflect the assumed issuance of common shares for all potentially dilutive securities, which consist of outstanding stock options. Potentially dilutive shares are excluded from the computation of diluted loss per share if their effect is anti-dilutive. Options to purchase 665,000 and 60,000 shares of common stock were excluded from the computation of diluted shares for the three and six months ended March 31, 2021 and 2020, respectively, as their inclusion would have been anti-dilutive. Reconciliations between net loss attributable to Barnwell stockholders and common shares outstanding of the basic and diluted net loss per share computations are detailed in the following tables:
| Three months ended March 31, 2021
| Net Loss (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic net loss per share | $ | (856,000) |  |  | 8,277,160 |  |  | $ | (0.10) |
Effect of dilutive securities - |  |  |  |  |
common stock options | — |  |  | — |  |  |
Diluted net loss per share | $ | (856,000) |  |  | 8,277,160 |  |  | $ | (0.10) |
| Six months ended March 31, 2021
| Net Loss (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic net loss per share | $ | (272,000) |  |  | 8,277,160 |  |  | $ | (0.03) |
Effect of dilutive securities - |  |  |  |  |
common stock options | — |  |  | — |  |  |
Diluted net loss per share | $ | (272,000) |  |  | 8,277,160 |  |  | $ | (0.03) |
| Three months ended March 31, 2020
| Net Loss (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic net loss per share | $ | (1,514,000) |  |  | 8,277,160 |  |  | $ | (0.18) |
Effect of dilutive securities - |  |  |  |  |
common stock options | — |  |  | — |  |  |
Diluted net loss per share | $ | (1,514,000) |  |  | 8,277,160 |  |  | $ | (0.18) |
| Six months ended March 31, 2020
| Net Loss (Numerator) |  | Shares (Denominator) |  | Per-Share Amount
Basic net loss per share | $ | (1,928,000) |  |  | 8,277,160 |  |  | $ | (0.23) |
Effect of dilutive securities - |  |  |  |  |
common stock options | — |  |  | — |  |  |
Diluted net loss per share | $ | (1,928,000) |  |  | 8,277,160 |  |  | $ | (0.23) |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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