Note 6 - Inventories (Tables)

6 Months Ended

Sep. 30, 2016

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	Sept. 30, 2016		March 31, 2016
Raw materials	$	639,275	$	810,987
Work in process		1,808,909		1,653,800
Finished goods		460,697		740,446
Total inventories	$	2,908,881	$	3,205,233