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Note 6 - Inventories - Summary of Inventories (Details) - USD ($)
Sep. 30, 2021
Mar. 31, 2021
Raw materials $ 814,313 $ 660,678
Work in process 2,587,889 2,220,723
Finished goods 580,569 1,019,376
Total inventories $ 3,982,771 $ 3,900,777 [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.