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Supplemental Balance Sheet Disclosures - Accrued Expenses (Details) - USD ($)
3 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Accrued expenses    
Warranty $ 596,436 $ 589,260
Salary, benefits and payroll taxes 220,705 385,287
Professional fees 208,680 163,130
Operating lease 14,122 14,296
Other 395,585 279,142
Total accrued expenses 1,435,528 $ 1,431,115
Warranty cost and accrual information    
Warranty accrual, beginning of period 589,260  
Accrued expense 32,590  
Warranty cost (25,414)  
Warranty accrual, end of period $ 596,436