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v3.21.2

Summary of Significant Accounting Policies - Concentrations (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) a | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2021 USD ($) a | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($)
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable | $ 6,105,000 |  |  |  | $ 4,347,000 |  |  |  | $ 6,105,000 | $ 4,347,000 |
Revenue | 4,000,000 | $ 34,888,000 | $ 55,944,000 | $ 13,732,000 | $ 4,865,000 | $ 26,122,000 | $ 50,515,000 | $ 11,005,000 |  |  |
Tropicana |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accounts Receivable | $ 3,066,000 |  |  |  |  |  |  |  | 3,066,000 |  |
Revenue |  |  |  |  |  |  |  |  | $ 84,136,000 | $ 80,388,000 | $ 108,318,000
Area of land owned (in acres) | a | 7,000 |  |  |  |  |  |  |  | 7,000 |  |
Operating Revenue |  |  |  |  |  |  |  |  | $ 15,752,000 |  |
Tropicana | Total Revenue | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
% of Total Revenue |  |  |  |  |  |  |  |  | 77.50% | 86.90% | 88.60%
% of Total Revenue |  |  |  |  |  |  |  |  | 90.10% |  |

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