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Summary of Significant Accounting Policies - Concentrations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable | $ 2,544 |  |  |  | $ 4,286 |  |  |  | $ 2,544 | $ 4,286 |
Operating revenue | 1,631 | $ 26,517 | $ 35,600 | $ 17,533 | 4,666 | $ 51,518 | $ 56,200 | $ 17,445 | 81,281 | 129,829 | $ 144,196
Tropicana |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable | 1,797 |  |  |  | 2,506 |  |  |  | 1,797 | 2,506 |
Operating revenue |  |  |  |  |  |  |  |  | $ 70,396 | $ 111,197 | $ 46,898
Tropicana | Total Revenue | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
% of Total Revenue |  |  |  |  |  |  |  |  | 86.60% | 85.60% | 32.50%
Cutrale Citrus Juice |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable | 0 |  |  |  | 0 |  |  |  | $ 0 | $ 0 |
Operating revenue |  |  |  |  |  |  |  |  | $ 0 | $ 1,364 | $ 22,735
Cutrale Citrus Juice | Total Revenue | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
% of Total Revenue |  |  |  |  |  |  |  |  | 0.00% | 1.10% | 15.80%
Minute Maid |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable | $ 0 |  |  |  | $ 0 |  |  |  | $ 0 | $ 0 |
Operating revenue |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 49,271
Minute Maid | Total Revenue | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
% of Total Revenue |  |  |  |  |  |  |  |  | 0.00% | 0.00% | 34.20%

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