Note 16 Income Taxes (Narratives) (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	$ 213,000	$ 499,000	$ 281,000
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	77,500,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	9,100,000
Expiration of Operating Loss Carryforwards	from fiscal 2016 to 2023
Operating Loss Carryforwards, Valuation Allowance	8,900,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	32,000	87,000
Unrecognized Tax Benefits	8,156,000	6,978,000	6,736,000	6,318,000
Unrecognized Tax Benefits, Period Increase (Decrease)	1,200,000
Increases in Balances Related to Tax Positions Taken during the Current Period	4,035,000	684,000	964,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1,000,000
Undistributed Earnings of Foreign Subsidiaries	110,700,000
Unrecognized Tax Benefits, Increase in Income Tax Penalties and Interest Accrued [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	$ 406,000