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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) CAD in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2016 USD ($) venture | Sep. 30, 2016 CAD | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($)
Principles of Consolidation |  |  |  |
Number of 80%-owned joint ventures | venture | 2 |  |  |
Restricted Cash and Investments [Abstract] |  |  |  |
Restricted cash |  | CAD 500 | $ 381 | $ 7,458
Retirement Plans |  |  |  |
Increase (decrease) pension expense | $ | $ 43 |  |  |
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Abstract] |  |  |  |
Discount Rate | 10.00% |  |  |
Minimum |  |  |  |
Equity Method Investments |  |  |  |
Ownership interest in affiliated companies required to account investments under equity method investments (more than) | 3.00% |  |  |
Maximum |  |  |  |
Equity Method Investments |  |  |  |
Ownership interest in affiliated companies required to account investments under equity method investments (more than) | 5.00% |  |  |
Retirement Plans |  |  |  |
Decrease (increase) in the expected return on plan assets assumption | 0.50% |  |  |
Kaupulehu Developments |  |  |  |
Principles of Consolidation |  |  |  |
Ownership interest in subsidiaries | 77.60% |  |  |
KD Kona 2013 LLLP |  |  |  |
Principles of Consolidation |  |  |  |
Ownership interest in subsidiaries | 75.00% |  |  |
Kaupulehu 2007, LLLP |  |  |  |
Principles of Consolidation |  |  |  |
Ownership interest in subsidiaries | 80.00% |  |  |
Kaupulehu Investors, LLC |  |  |  |
Principles of Consolidation |  |  |  |
Ownership interest in subsidiaries | 80.00% |  |  |

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