Note 2 - Excess and Obsolete Inventory Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Beninning Balance	$ 22,753	$ 24,304	$ 25,289
Utilization or sale	(2,455)	(1,637)	(1,579)
Scrap	(3,217)	(2,901)	(3,422)
Additional provision	4,125	4,487	3,503
Foreign currency translation adjustments	174	(1,500)	513
Ending Balance	$ 21,380	$ 22,753	$ 24,304