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Schedule of Company Financial Assets and Liabilities at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Money market investments | $ 21,931 | $ 21,094
Available for sale securities | 4,794 | 4,513
Contingent consideration | 4,705 |
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Money market investments | 21,931 | 21,094
Available for sale securities | 4,794 | 4,513
Contingent consideration | 0 |
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Money market investments | 0 | 0
Available for sale securities | 0 | 0
Contingent consideration | 0 |
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |
Money market investments | 0 | 0
Available for sale securities | 0 | $ 0
Contingent consideration | $ 4,705 |

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