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Supplemental Balance Sheet Disclosures - Inventories and Prepaid expenses and other current assets (Details) - USD ($) | Dec. 31, 2022 | Sep. 30, 2022
--- | --- | ---
Inventory Valuation |  |
Raw materials | $ 4,685,109 | $ 4,451,045
Work-in-process | 530,992 | 795,723
Finished goods | 36,194 | 102,336
Total inventories | 5,252,295 | 5,349,104
Prepaid expenses and other current assets |  |
Prepaid insurance | 801,703 | 777,311
Other | 247,503 | 365,159
Total prepaid expenses and other current assets | $ 1,049,206 | $ 1,142,470

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