Goodwill And Other Intangible Assets Amortization expense and currency translation (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Currency translation	$ (8)	$ (29)
Total change in accumulated amortization	404	435
Local Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	400	421
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	9	9
Existing Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	0	33
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 3	$ 1