Goodwill And Other Intangible Assets Amortization expense and currency translation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Currency translation	$ (59)	$ (25)	$ 25
Total change in accumulated amortization	764	855	648
Local relationships
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	801	828	573
Tradenames
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	14	17	17
Existing technology
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	0	33	33
Patents
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 8	$ 2