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Joint Venture - Narrative (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 21 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 CNY (¥) | Aug. 31, 2018 | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2018 CNY (¥) | Sep. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jan. 10, 2017 CNY (¥) | Jan. 10, 2017 USD ($) | Mar. 29, 2016 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from investment by noncontrolling interest |  |  | $ 0 | $ 86,994 |  |  |  |  |  |
Parent Company | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture') |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Percent ownership in joint venture | 54.40% | 54.40% |  |  |  |  |  |  |  |
Chongqing Funds | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture') |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Percent ownership in joint venture | 45.60% | 45.60% |  |  |  |  |  |  |  |
Corporate Joint Venture |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Total price payable under EPC Contract |  |  |  |  |  |  |  | ¥ 540,000,000 | $ 78,000 |
Contractual obligation, payment |  |  |  |  | ¥ 469,500,000 | $ 68,300 |  |  |  |
Contract amount payable in fiscal year 2019 | ¥ 70,500,000 |  |  |  | ¥ 70,500,000 |  | $ 10,200 |  |  |
Corporate Joint Venture | Facility in Liangjiang New Area of Chongqing (the 'Joint Venture') |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Initial capitalization of joint venture |  |  |  |  |  |  |  |  |  | $ 330,000
Corporate Joint Venture | Design Fees |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Total price payable under EPC Contract |  |  |  |  |  |  |  | 19,500,000 | 2,800 |
Corporate Joint Venture | Construction and Procurement Fees |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |
Total price payable under EPC Contract |  |  |  |  |  |  |  | ¥ 520,500,000 | $ 75,200 |

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