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Supplemental Balance Sheet Disclosures - Accrued Expenses (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2022 | Sep. 30, 2021
Accrued expenses |  |  |
Warranty | $ 600,621 | $ 600,621 | $ 589,260
Salary, benefits and payroll taxes | 553,482 | 553,482 | 385,287
Professional fees | 176,433 | 176,433 | 163,130
Income taxes payable |  |  | 104,737
Operating lease | 13,782 | 13,782 | 14,296
Other | 339,112 | 339,112 | 174,405
Total accrued expenses | 1,683,430 | 1,683,430 | $ 1,431,115
Warranty cost and accrual information |  |  |
Warranty accrual, beginning of period | 585,867 | 589,260 |
Accrued expense | 50,399 | 115,043 |
Warranty cost | (35,645) | (103,682) |
Warranty accrual, end of period | $ 600,621 | $ 600,621 |

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