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
Sep. 30, 2012
Mar. 31, 2012
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term $ 2,332  
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     
Note payable guarantee     
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     
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 42  
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 74,225 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 42  
Note payable guarantee 14 25
Recurring [Member] | Contingent consideration payable net [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term 2,332  
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 74,225 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    
Note payable guarantee     
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Contingent consideration payable net [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term     
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      
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    
Note payable guarantee      
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Contingent consideration payable net [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term     
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      
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    
Note payable guarantee 14 25
Recurring [Member] | Unobservable Inputs (Level 3) [Member] | Contingent consideration payable net [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Contingent consideration long-term $ 2,332