Note 6 - Inventories (Tables)

3 Months Ended

Jun. 30, 2017

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	June 30, 2017		March 31, 2017
Raw materials	$	676,703	$	786,775
Work in process		1,900,285		1,968,990
Finished goods		671,757		602,533
Total inventories	$	3,248,745	$	3,358,298