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Supplemental Balance Sheet Disclosures - Inventories and Prepaid expenses and other current assets (Details) - USD ($) | Dec. 31, 2023 | Sep. 30, 2023
--- | --- | ---
Inventory Valuation |  |
Raw materials | $ 6,495,880 | $ 5,162,177
Work-in-process | 1,211,405 | 966,888
Finished goods | 92,650 | 10,648
Total inventories | 7,799,935 | 6,139,713
Prepaid expenses and other current assets |  |
Prepaid insurance | 635,482 | 623,186
Other | 284,157 | 449,826
Total prepaid expenses and other current assets | $ 919,639 | $ 1,073,012

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