SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation The condensed consolidated financial statements include the accounts of Barnwell Industries, Inc. and all majority-owned subsidiaries (collectively referred to herein as “Barnwell,” “we,” “our,” “us,” or the “Company”), including a 77.6%-owned land investment general partnership (Kaupulehu Developments), a 75%-owned land investment partnership (KD Kona 2013 LLLP) and two 80%-owned joint ventures (Kaupulehu 2007, LLLP and Kaupulehu Investors, LLC). All significant intercompany accounts and transactions have been eliminated. Barnwell’s investments in both unconsolidated entities in which a significant, but less than controlling, interest is held and in variable interest entities (“VIE”) in which the Company is not deemed to be the primary beneficiary are accounted for by the equity method. Unless otherwise indicated, all references to “dollars” in this Form 10-Q are to U.S. dollars. Unaudited Interim Financial Information The accompanying unaudited condensed consolidated financial statements and notes have been prepared by Barnwell in accordance with the rules and regulations of the United States (“U.S.”) Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. These condensed consolidated financial statements and notes should be read in conjunction with the consolidated financial statements and notes thereto included in Barnwell’s September 30, 2016 Annual Report on Form 10-K. The Condensed Consolidated Balance Sheet as of September 30, 2016 has been derived from audited consolidated financial statements. In the opinion of management, all adjustments (which include only normal recurring adjustments) necessary to present fairly the financial position at March 31, 2017, results of operations and comprehensive income (loss) for the three and six months ended March 31, 2017 and 2016, and equity and cash flows for the six months ended March 31, 2017 and 2016, have been made. The results of operations for the period ended March 31, 2017 are not necessarily indicative of the operating results for the full year. Use of Estimates The preparation of the financial statements in conformity with U.S. GAAP requires management of Barnwell to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities. Actual results could differ significantly from those estimates. Reclassifications Fees related to percentage of sales payments have been reclassified to general and administrative expenses rather than being presented net with sale of interest in leasehold land revenues for the prior year periods to conform to the current year periods presentation. Significant Accounting Policies There have been no changes to Barnwell’s significant accounting policies as described in the Notes to Consolidated Financial Statements included in Item 8 of the Company’s most recently filed Annual Report on Form 10-K. Recent Accounting Pronouncements In January 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-01, “Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items,” which eliminates the concept of an extraordinary item from GAAP. As a result, an entity will no longer be required to separately classify, present and disclose extraordinary events and transactions. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements. In February 2015, the FASB issued ASU No. 2015-02, "Amendments to the Consolidation Analysis," which simplifies the current consolidation guidance and will require companies to reevaluate limited partnerships and similar entities for consolidation. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs." This amendment was issued to simplify the presentation of debt issuance costs by requiring debt issuance costs to be presented as a deduction from the corresponding debt liability. This will make the presentation of debt issuance costs consistent with the presentation of debt discounts or premiums. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements. In July 2015, the FASB issued ASU No. 2015-12, "Plan Accounting: (Part I) Fully Benefit-Responsive Investment Contracts, (Part II) Plan Investment Disclosures, (Part III) Measurement Date Practical Expedient." This ASU aims to simplify the accounting and presentation of plan accounting. Part I of this ASU requires fully benefit-responsive investment contracts to be measured at contract value instead of the current fair value measurement. Part II simplifies the investment disclosure requirements for employee benefit plans. Part III provides an alternative measurement date for fiscal periods that do not coincide with a month-end date. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements. In September 2015, the FASB issued ASU No. 2015-16, "Simplifying the Accounting for Measurement-Period Adjustments." This ASU eliminates the requirement to account for business combination measurement period adjustments retrospectively. Measurement period adjustments will now be recognized prospectively in the reporting period in which the adjustment amount is determined. The nature and amount of any measurement period adjustments recognized during the reporting period must be disclosed, including the value of the adjustment to each current period income statement line item relating to the income effects that would have been recognized in previous periods if the adjustment to provisional amounts were recognized as of the acquisition date. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

The condensed consolidated financial statements include the accounts of Barnwell Industries, Inc. and all majority-owned subsidiaries (collectively referred to herein as “Barnwell,” “we,” “our,” “us,” or the “Company”), including a 77.6%-owned land investment general partnership (Kaupulehu Developments), a 75%-owned land investment partnership (KD Kona 2013 LLLP) and two 80%-owned joint ventures (Kaupulehu 2007, LLLP and Kaupulehu Investors, LLC). All significant intercompany accounts and transactions have been eliminated.

Barnwell’s investments in both unconsolidated entities in which a significant, but less than controlling, interest is held and in variable interest entities (“VIE”) in which the Company is not deemed to be the primary beneficiary are accounted for by the equity method.

Unless otherwise indicated, all references to “dollars” in this Form 10-Q are to U.S. dollars.

Unaudited Interim Financial Information

The accompanying unaudited condensed consolidated financial statements and notes have been prepared by Barnwell in accordance with the rules and regulations of the United States (“U.S.”) Securities and Exchange Commission. Accordingly, certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. These condensed consolidated financial statements and notes should be read in conjunction with the consolidated financial statements and notes thereto included in Barnwell’s September 30, 2016 Annual Report on Form 10-K. The Condensed Consolidated Balance Sheet as of September 30, 2016 has been derived from audited consolidated financial statements.

In the opinion of management, all adjustments (which include only normal recurring adjustments) necessary to present fairly the financial position at March 31, 2017, results of operations and comprehensive income (loss) for the three and six months ended March 31, 2017 and 2016, and equity and cash flows for the six months ended March 31, 2017 and 2016, have been made. The results of operations for the period ended March 31, 2017 are not necessarily indicative of the operating results for the full year.

Use of Estimates

The preparation of the financial statements in conformity with U.S. GAAP requires management of Barnwell to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities. Actual results could differ significantly from those estimates.

Reclassifications

Fees related to percentage of sales payments have been reclassified to general and administrative expenses rather than being presented net with sale of interest in leasehold land revenues for the prior year periods to conform to the current year periods presentation.

Significant Accounting Policies

There have been no changes to Barnwell’s significant accounting policies as described in the Notes to Consolidated Financial Statements included in Item 8 of the Company’s most recently filed Annual Report on Form 10-K.

Recent Accounting Pronouncements

In January 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2015-01, “Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items,” which eliminates the concept of an extraordinary item from GAAP. As a result, an entity will no longer be required to separately classify, present and disclose extraordinary events and transactions. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements.

In February 2015, the FASB issued ASU No. 2015-02, "Amendments to the Consolidation Analysis," which simplifies the current consolidation guidance and will require companies to reevaluate limited partnerships and similar entities for consolidation. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements.

In April 2015, the FASB issued ASU No. 2015-03, "Simplifying the Presentation of Debt Issuance Costs." This amendment was issued to simplify the presentation of debt issuance costs by requiring debt issuance costs to be presented as a deduction from the corresponding debt liability. This will make the presentation of debt issuance costs consistent with the presentation of debt discounts or premiums. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements.

In July 2015, the FASB issued ASU No. 2015-12, "Plan Accounting: (Part I) Fully Benefit-Responsive Investment Contracts, (Part II) Plan Investment Disclosures, (Part III) Measurement Date Practical Expedient." This ASU aims to simplify the accounting and presentation of plan accounting. Part I of this ASU requires fully benefit-responsive investment contracts to be measured at contract value instead of the current fair value measurement. Part II simplifies the investment disclosure requirements for employee benefit plans. Part III provides an alternative measurement date for fiscal periods that do not coincide with a month-end date. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements.

In September 2015, the FASB issued ASU No. 2015-16, "Simplifying the Accounting for Measurement-Period Adjustments." This ASU eliminates the requirement to account for business combination measurement period adjustments retrospectively. Measurement period adjustments will now be recognized prospectively in the reporting period in which the adjustment amount is determined. The nature and amount of any measurement period adjustments recognized during the reporting period must be disclosed, including the value of the adjustment to each current period income statement line item relating to the income effects that would have been recognized in previous periods if the adjustment to provisional amounts were recognized as of the acquisition date. The Company adopted the provisions of this ASU effective October 1, 2016. The adoption of this update did not have a material impact on Barnwell’s consolidated financial statements.