Note 12 Employee Equity Incentive Plans (Allocated Share-based Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended				12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Mar. 31, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based Compensation Effect in Income before Taxes	$ 692		$ 726		$ 2,033		$ 2,857
Provision for Income Taxes	242	[1]	254	[1]	712	[1]	1,000	[1]
Net Stock-based Compensation Effects on Net Income	450		472		1,321		1,857
Estimated Statutory Income Tax Rate									35.00%	35.00%
Cost of Goods Sold [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based Compensation Effect in Income before Taxes	101		88		350		318
Research, Development and Engineering [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based Compensation Effect in Income before Taxes	247		252		703		815
Selling, General and Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based Compensation Effect in Income before Taxes	$ 344		$ 386		$ 980		$ 1,724

[1] Estimated at an income tax rate of 35% in fiscal 2014 and fiscal 2013.