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.