Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v2.4.0.6
Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Mar. 31, 2012
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term $ 2,221 $ 0
Unobservable Inputs (Level 3) [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration 3,500  
Recurring [Member] | Cash and cash equivalents [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Money market funds 85,466 82,931
Recurring [Member] | Accrued expenses [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration 181  
Note payable guarantee 14 25
Recurring [Member] | Contingent consideration long-term [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term 2,221  
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Cash and cash equivalents [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Money market funds 85,466 82,931
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Accrued expenses [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration 0  
Note payable guarantee 0 0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Contingent consideration long-term [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term 0  
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Cash and cash equivalents [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Money market funds 0 0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Accrued expenses [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration 0  
Note payable guarantee 0 0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Contingent consideration long-term [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term 0  
Recurring [Member] | Unobservable Inputs (Level 3) [Member] | Cash and cash equivalents [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Money market funds 0 0
Recurring [Member] | Unobservable Inputs (Level 3) [Member] | Accrued expenses [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration 181  
Note payable guarantee 14 25
Recurring [Member] | Unobservable Inputs (Level 3) [Member] | Contingent consideration long-term [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term $ 2,221