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Commitments and Contingencies (Details Narrative) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2003 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Self-insured retention |  |  |  | $ 100,000 |  |
Finite risk sinking fund |  | $ 11,469,000 |  | 11,469,000 |  | $ 11,446,000
Interest income |  | 2,000 | $ 28,000 | 23,000 | $ 112,000 |
Letters of credit outstanding, amount |  | 3,020,000 |  | 3,020,000 |  |
Bond outstanding |  | 50,092,000 |  | 50,092,000 |  |
American International Group, Inc [Member] |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Period of finite risk insurance policy | 25 years |  |  |  |  |
Maximum allowable coverage of insurance policy |  | 28,177,000 |  | 28,177,000 |  |
Coverage amount under the policy |  | 19,898,000 |  | 19,898,000 |  |
Interest income |  | $ 2,000 | $ 28,000 | $ 23,000 | $ 111,000 |
Insurers obligation to entity on termination of contract |  | 100.00% |  | 100.00% |  |
American International Group, Inc [Member] | 2003 Closure Policy [Member] |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |
Finite risk sinking fund |  | $ 11,469,000 |  | $ 11,469,000 |  | 11,446,000
Interest income |  |  |  | $ 1,998,000 |  | $ 1,975,000

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