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Fair Value Measurements (Schedule of Company Financial Assets and Liabilities at Fair Value on Recurring Basis) (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investment | $ 24,793 | $ 21,931
Available for sale securities | 5,358 | 4,794
Contingent consideration |  | (4,705)
Fair Value, Inputs, Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investment | 24,793 | 21,931
Available for sale securities | 5,358 | 4,794
Contingent consideration |  | 0
Fair Value, Inputs, Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investment | 0 | 0
Available for sale securities | 0 | 0
Contingent consideration |  | 0
Fair Value, Inputs, Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investment | 0 | 0
Available for sale securities | $ 0 | 0
Contingent consideration |  | $ (4,705)

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