Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2012
Costs and expenses:
Total share-based compensation	$ 419	$ 705	$ 1,383		$ 1,661
Software, hardware and supplies charges	(5,624)	(4,187)	(11,395)	(8,801)
Income tax benefit	(127)	(260)	(447)		(618)
Decrease in net income	(292)	(445)	(936)		(1,043)
Cost of revenue [Member]
Costs and expenses:
Total share-based compensation	73	70
Software, hardware and supplies charges			(149)		(119)
Research and development costs [Member]
Costs and expenses:
Total share-based compensation	74	44
Software, hardware and supplies charges			(133)		(77)
Selling, general and administrative [Member]
Costs and expenses:
Total share-based compensation	272	591
Software, hardware and supplies charges			$ (1,101)		$ (1,465)