Note 4 - Inventories

12 Months Ended

Mar. 31, 2021

Notes to Financial Statements

Inventory Disclosure [Text Block]

NOTE

4.

INVENTORIES

Inventories are shown in the following table:
 

	March 31
	2021		2020
Raw materials	$	660,678	$	1,017,451
Work in process		2,220,723		1,863,000
Finished goods		1,019,376		1,003,999
Total inventories	$	3,900,777	$	3,884,450