Note 15 Restructuring Charges (Narratives) (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013 Total Restructuring on Severance and Facility Closing [Member]	Mar. 31, 2012 Total Restructuring on Severance and Facility Closing [Member]	Mar. 31, 2011 Total Restructuring on Severance and Facility Closing [Member]	Mar. 31, 2010 Total Restructuring on Severance and Facility Closing [Member]
Restructuring Charges [Abstract]
Restructuring and Related Activities, Description	In the quarter ended September 30, 2009, we initiated plans to restructure our European manufacturing and assembly operations to align them to current market conditions. The plans primarily involved the termination of employees and centralization of certain positions. Costs related to termination of employees represented severance payments and benefits. The restructuring charges recorded in conjunction with the plans represented severance costs and have been included under “Restructuring charges” on our consolidated statements of operations.
Restructuring, Settlement and Impairment Provisions	$ 0	$ 0	$ 759,000
Business Exit Costs			659,000
Severance Costs			100,000
Restructuring and Related Activities, Completion Date	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve				$ 69,000	$ 199,000	$ 485,000	$ 1,205,000