XML 35 R23.htm IDEA: XBRL DOCUMENT v3.22.1
Note 4 - Inventories (Tables)
12 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

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