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Basis of Presentation - Narrative (Details) a in Thousands, $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Oct. 01, 2018 USD ($) | Jun. 30, 2019 USD ($) a classification | Mar. 31, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) a classification segment | Jun. 30, 2018 USD ($) | Sep. 30, 2018 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Number of business segments | segment |  |  |  |  | 2 |  |
Accounts receivable, net |  | $ 6,285 |  |  | $ 6,285 |  | $ 2,544
Citree |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Net loss attributable to noncontrolling interest |  | $ 57 |  | $ 15 | $ 308 | $ 65 |
Land |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Area of land owned (in acres) | a |  | 117 |  |  | 117 |  |
Number of primary classifications | classification |  | 2 |  |  | 2 |  |
Mineral Rights |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Area of land owned (in acres) | a |  | 90 |  |  | 90 |  |
Citree |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Ownership interest (as a percent) |  | 51.00% |  |  | 51.00% |  |
Citrus |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Accounts receivable, net |  | $ 5,417 |  |  | $ 5,417 |  | $ 2,471
Discontinued Operations, Disposed of by Sale | ASC 610-20 |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Net adjustment to retained earnings | $ 14,601 |  | $ 3,704 |  |  |  |

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