Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Costs and expenses:
Total share-based compensation	$ 584	$ 419	$ 1,125	$ 1,383
Software and hardware charges	(4,779)	(5,624)	(9,713)	(11,395)
Income tax benefit	(184)	(127)	(352)	(447)
Decrease in net income	(400)	(292)	(773)	(936)
Cost of revenue [Member]
Costs and expenses:
Total share-based compensation	89	73
Software and hardware charges			(163)	(149)
Research and development costs [Member]
Costs and expenses:
Total share-based compensation	89	74
Software and hardware charges			(131)	(133)
Selling, general and administrative [Member]
Costs and expenses:
Total share-based compensation	406	272
Software and hardware charges			$ (831)	$ (1,101)