Note 6 - Inventories (Tables)

9 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	Dec. 31, 2016		March 31, 2016
Raw materials	$	763,869	$	810,987
Work in process		1,779,504		1,653,800
Finished goods		619,105		740,446
Total inventories	$	3,162,478	$	3,205,233