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Note 6 - Inventories - Summary of Inventories (Details) - USD ($)
Sep. 30, 2022
Mar. 31, 2022
Raw materials $ 1,324,358 $ 987,062
Work in process 3,829,498 3,355,838
Finished goods 640,993 745,735
Total inventories $ 5,794,849 $ 5,088,635 [1]
[1] The March 31, 2021 Balance Sheet is derived from the audited financial statements contained in our Annual Report on Form 10-K for the fiscal year ended March 31, 2021.