Restructuring and Related Charges (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Mar. 31, 2012
Restructuring Reserve [Roll Forward]
Balance at March 31, 2013		$ 584
Provision	512
Payments for restructuring, severance and other charges	(658)
Balance at June 30, 2013	438	584
Severance and employment costs [Member] | Fiscal 2012 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2013		348
Provision	0
Payments for restructuring, severance and other charges	(348)
Balance at June 30, 2013	0	348
Severance and employment costs [Member] | Restructuring Plan Fiscal Two Zero One Four [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2013		0
Provision	512
Payments for restructuring, severance and other charges	(160)
Balance at June 30, 2013	352	0
Facilities costs [Member] | Fiscal 2009 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at March 31, 2013		236
Provision	0
Payments for restructuring, severance and other charges	(150)
Balance at June 30, 2013	$ 86	$ 236