Discontinued Operation and Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012
Restructuring reserve
Restructuring reserve as of March 31, 2012	$ 830
Cash paid - fiscal 2013	(425)
Non-cash reductions - fiscal 2013	(29)
Restructuring reserve as of June 30, 2012	376
Employee Termination Costs [Member]
Restructuring reserve
Restructuring reserve as of March 31, 2012	750
Cash paid - fiscal 2013	(400)
Non-cash reductions - fiscal 2013	(10)
Restructuring reserve as of June 30, 2012	340
Facility and Other Costs [Member]
Restructuring reserve
Restructuring reserve as of March 31, 2012	80
Cash paid - fiscal 2013	(25)
Non-cash reductions - fiscal 2013	(19)
Restructuring reserve as of June 30, 2012	$ 36