Statements of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net loss	$ (9,999,613)	$ (9,948,168)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization and depreciation	118,620	80,748
Stock-based compensation	947,212	1,793,199
Payroll protection program loan forgiveness		(83,333)
Fair value change of convertible promissory notes		(1,974)
Issuance costs attributed to financing activities		3,053
Amortization of discounts and premiums on short-term investments	(11,471)
Non-cash lease expense	107,593	66,382
Issuance of warrants in connection with Zimmer contract amendment	104,562
Change in assets and liabilities:
Accounts receivable	15,099	(48,336)
Inventory	(606,251)	(98,287)
Prepaid and other assets	(145,540)	(8,320)
Accounts payable	515,438	(350,313)
Accrued expenses, deferred revenue, operating lease and other liabilities	1,434,817	(7,477)
Net cash used in operating activities	(7,519,534)	(8,602,826)
Investing activities
Purchases of short-term investments	(3,469,539)
Maturities of short-term investments	500,000
Purchase of property and equipment	(275,226)	(67,079)
Net cash used in investing activities	(3,244,765)	(67,079)
Financing activities
Proceeds from issuance of common stock in connection with public offering and private placements	13,350,582	8,829,236
Proceeds from issuance of warrants in connection with private placements		3,670,764
Issuance costs in connection with convertible promissory notes		(3,053)
Issuance costs in connection with public offering and private placements	(1,327,300)	(1,198,080)
Exercise of warrants		275,000
Exercise of stock-options		10,146
Deferred offering costs		(49,159)
Net cash provided by financing activities	12,023,282	11,534,854
Net increase in cash and cash equivalents	1,258,983	2,864,949
Cash and cash equivalents at beginning of year	6,901,346	4,036,397
Cash and cash equivalents at end of year	8,160,329	6,901,346
Supplemental non-cash financing and investing transactions:
Conversion of convertible promissory notes to equity		1,005,232
Unpaid issuance costs and non-cash adjustments attributed to convertible notes and private placement		50,400
Operating lease right of use asset obtained in exchange for operating lease		73,118
Payroll protection program loan forgiveness		83,333
Unpaid deferred offering costs		67,954
Unpaid purchases of property and equipment		48,651
Reclass of deferred offering costs to additional paid-in capital in connection with public offering	$ 24,980