Note 6 - Inventories (Details) - USD ($)	Sep. 30, 2015	Mar. 31, 2015
Raw materials	$ 813,644	$ 738,169
Work in process	1,692,008	2,302,751
Finished goods	642,216	701,572
Total inventories	$ 3,147,868	$ 3,742,492	[1]

[1] The March 31, 2015 Balance Sheet is derived from the audited financial statements contained in our Annual Report on Form 10-K for the fiscal year ended March 31, 2015.