Note 2 - Inventories, Net - Components of Inventory (Details) - Scenario, Unspecified [Domain] - USD ($) $ in Thousands		Mar. 31, 2015	Mar. 31, 2014
Raw materials		$ 931	$ 927
Work in process		1,509	923
Finished goods(1)	[1]	2,895	3,210
Supplies		343	281
		$ 5,678	$ 5,341

[1] Net of reserve for obsolescence of $4,000 and $6,000 at March 31, 2015 and 2014, respectively.