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Note 6 - Inventories
9 Months Ended
Dec. 31, 2021
Notes to Financial Statements  
Inventory Disclosure [Text Block]

NOTE 6. INVENTORIES

 

Inventories are shown in the following table:

 

  

December 31,

2021

  

March 31,

2021

 

Raw materials

 $784,004  $660,678 

Work in process

  2,812,910   2,220,723 

Finished goods

  770,760   1,019,376 

Total inventories

 $4,367,675  $3,900,777