Quarterly report pursuant to Section 13 or 15(d)

Restructuring Charge (Details)

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Restructuring Charge (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Restructuring charges        
Liability at March 31, 2012     $ 613  
Charged 0 (2) 149 275
Utilized     671  
Liability at December 31, 2012 91   91  
Employee-related [Member]
        
Restructuring charges        
Liability at March 31, 2012     561  
Charged     89  
Utilized     559  
Liability at December 31, 2012 91   91  
Other costs [Member]
        
Restructuring charges        
Liability at March 31, 2012     52  
Charged     60  
Utilized     112  
Liability at December 31, 2012 $ 0   $ 0