Discontinued Operation and Related Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2012
Restructuring reserve
Restructuring reserve as of March 31, 2012	$ 830
Cash paid	693
Non-cash reductions	(92)
Restructuring reserve as of December 31, 2012	45
Employee Termination Costs [Member]
Restructuring reserve
Restructuring reserve as of March 31, 2012	750
Cash paid	663
Non-cash reductions	(45)
Restructuring reserve as of December 31, 2012	42
Facility and Other Costs [Member]
Restructuring reserve
Restructuring reserve as of March 31, 2012	80
Cash paid	30
Non-cash reductions	(47)
Restructuring reserve as of December 31, 2012	$ 3