Note 4 - Inventories

12 Months Ended

Mar. 31, 2022

Notes to Financial Statements

Inventory Disclosure [Text Block]

NOTE 4. INVENTORIES

Inventories are shown in the following table:

	March 31
	2022		2021
Raw materials	$	987,062	$	660,678
Work in process		3,355,838		2,220,723
Finished goods		745,735		1,019,376
Total inventories	$	5,088,635	$	3,900,777