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Accrued Expenses (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2021
Accrued Expenses |
Schedule of accrued expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | September 30,
​ | ​ | 2021 | ​ | 2020
​ | ​ | ​ | ​ | ​ | ​ | ​
Warranty | ​ | $ | 589,260 | ​ | $ | 547,743
Salary, benefits and payroll taxes | ​ |  | 385,287 | ​ |  | 483,797
Professional fees | ​ |  | 163,130 | ​ |  | 151,956
Operating lease | ​ | ​ | 14,296 | ​ | ​ | 45,126
Other | ​ |  | 279,142 | ​ |  | 133,338
​ | ​ | $ | 1,431,115 | ​ | $ | 1,361,960

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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