Note 6 - Inventories

3 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Inventory Disclosure [Text Block]

NOTE

6.

INVENTORIES

     Inventories are shown in the following table:

	June 30, 2018		March 31, 2018
Raw materials	$	1,064,517	$	1,084,030
Work in process		1,889,635		1,828,492
Finished goods		667,529		737,917
Total inventories	$	3,621,681	$	3,650,439