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Condensed Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Operating activities    
Net loss $ (8,724,370) $ (8,625,269)
Adjustments to reconcile net loss to net cash used in operating activities:    
Amortization and depreciation 136,757 85,198
Stock-based compensation 834,211 691,336
Amortization of discounts and premiums on short-term investments (45,571)
Non-cash lease expense 81,567 80,020
Change in assets and liabilities:    
Accounts receivable 33,237 48,336
Inventory (811,989) (355,998)
Prepaids and other assets 85,022 (145,462)
Accounts payable (62,808) (87,197)
Accrued expenses, deferred revenue, operating leases and other liabilities (1,510,104) (228,315)
Net cash used in operating activities (9,984,048) (8,537,351)
Investing activities    
Purchases of short-term investments (1,473,419)
Maturities of short-term investments 4,500,000
Purchase of property and equipment (326,497) (209,044)
Net cash provided by (used in) investing activities 2,700,084 (209,044)
Financing activities    
Proceeds from issuance of common stock in connection with at-the-market offering program and public offering 2,552,656 13,350,582
Issuance costs related to at-the-market offering program and public offering (234,725) (1,327,300)
Share repurchases for the payment of employee taxes (110,838)
Net cash provided by financing activities 2,207,093 12,023,282
Net (decrease) increase in cash and cash equivalents (5,076,871) 3,276,887
Cash and cash equivalents at beginning of period 8,160,329 6,901,346
Cash and cash equivalents at end of period 3,083,458 10,178,233
Supplemental non-cash financing and investing transactions:    
Reclass of deferred offering costs to additional paid-in capital in connection with public offering 24,980
Modification of right-of-use asset and associated lease liability 97,536
Unpaid deferred issuance costs (offset in prepaids and other assets) 67,159
Purchased property and equipment in accounts payable $ 26,798