Supplemental Balance Sheet Disclosures - Accrued Expenses (Details) - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Sep. 30, 2020
Accrued expenses
Warranty	$ 578,172	$ 578,172	$ 547,743
Salary, benefits and payroll taxes		180,218	483,797
Professional fees		235,661	151,956
Operating lease		24,307	45,126
Other		103,460	133,338
Total accrued expenses		$ 1,121,818	$ 1,361,960
Warranty cost and accrual information
Warranty accrual, beginning of period	547,743
Accrued expense	73,866
Warranty cost	(43,437)
Warranty accrual, end of period	$ 578,172