Note 12 Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Net Unrealized Gain (Loss) on Available-for-sale Investments Securities, Net of Taxes of $187 at September 30, 2012 and $(37) at March 31, 2012	$ 348	$ (68)
Unrecognized Actuarial Loss, Net of Tax of $(1,523)	(4,314)	(4,314)
Accumulated Foreign Currency Translation Adjustments	3,805	6,472
Total Accumulated Other Comprehensive Income (Loss)	(161)	2,090
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	187	(37)
Accumulated Other Comprehensive Loss, Pension, Tax	$ (1,523)	$ (1,523)