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Consolidated Balance Sheets - USD ($)
Mar. 31, 2023
Sep. 30, 2022
Current assets:    
Cash and cash equivalents $ 43,629,102 $ 17,396,812
Prepaid expenses and other current assets 9,423,025 10,123,634
Total current assets 53,052,127 27,520,446
Operating lease right-of-use assets, net 48,581 70,360
Equity method investment 809,470 804,930
Other assets 113,850 132,015
Total assets 54,024,028 28,527,751
Current liabilities:    
Current portion of long-term debt 31,823,000 10,915,015
Current portion of finance lease liabilities 10,332 11,751
Current portion of operating lease liabilities 3,929 26,995
Accounts payable 3,619,748 3,491,485
Accrued expenses 6,214,397 3,427,900
Income taxes payable 1,856,629 1,856,629
Total current liabilities 43,528,035 19,729,775
Finance lease liabilities   4,267
Warrant liability 8,263 57,138
Total liabilities 43,536,298 19,791,180
Commitments and contingencies (Note 8)
Convertible preferred stock:    
Total convertible preferred stock
Stockholders' equity:    
Preferred stock, value
Common stock, par value $0.01 per share; 425,000,000 shares authorized; 256,666,794 and 227,310,572 shares issued and outstanding at March 31, 2023 and September 30, 2022, respectively 2,566,667 2,273,105
Additional paid-in capital 442,173,380 415,398,984
Accumulated deficit (434,252,317) (408,935,518)
Total stockholders' equity 10,487,730 8,736,571
Total liabilities, convertible preferred stock and stockholders' equity 54,024,028 28,527,751
Series A convertible preferred stock    
Convertible preferred stock:    
Total convertible preferred stock
Series A-1 convertible preferred stock    
Convertible preferred stock:    
Total convertible preferred stock
Series B convertible preferred stock    
Stockholders' equity:    
Preferred stock, value