Note 6 - Inventories (Details) - USD ($)	Dec. 31, 2015	Mar. 31, 2015
Raw materials	$ 734,094	$ 738,169
Work in process	1,568,449	2,302,751
Finished goods	806,368	701,572
Total inventories	$ 3,108,911	$ 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.