Note 5 - Inventories (Tables)

12 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31
	2017		2016
Raw materials	$	786,775	$	810,987
Work in process		1,968,990		1,653,800
Finished goods		602,533		740,446
Total inventories	$	3,358,298	$	3,205,233