Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v2.4.0.8
Fair Value Measurements (Details) (Recurring [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Mar. 31, 2013
Cash and cash equivalents [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Money market funds $ 56,067 $ 52,849
Accrued Liabilities [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Current 249  
Contingent consideration non-current [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent 2,135 2,333
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 56,067 52,849
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Accrued Liabilities [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Current 0  
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Contingent consideration non-current [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent 0 0
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
Significant Other Observable Inputs (Level 2) [Member] | Accrued Liabilities [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Current 0  
Significant Other Observable Inputs (Level 2) [Member] | Contingent consideration non-current [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent 0 0
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
Unobservable Inputs (Level 3) [Member] | Accrued Liabilities [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Current 249  
Unobservable Inputs (Level 3) [Member] | Contingent consideration non-current [Member]
    
Assets and liabilities measured at fair value on a recurring basis and their related valuation inputs    
Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent $ 2,135 $ 2,333