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Supplemental Balance Sheet Disclosures - Inventories and Prepaid expenses and other current assets (Details) - USD ($)
Mar. 31, 2021
Sep. 30, 2020
Inventory Valuation    
Raw materials $ 3,604,917 $ 3,378,246
Work-in-process 778,151 656,382
Finished goods 271,043 256,707
Inventories 4,654,111 4,291,335
Prepaid expenses and other current assets    
Prepaid insurance 551,379 336,331
Other 284,682 338,778
Total prepaid expenses and other current assets $ 836,061 $ 675,109