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Fair Value Measurements - Schedule of Company Financial Assets and Liabilities at Fair Value on Recurring Basis (Details) - Recurring Basis - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investments |  | $ 21,931
Available for sale securities | $ 5,369 | 4,794
Contingent consideration |  | (4,705)
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investments |  | 21,931
Available for sale securities | 5,369 | 4,794
Contingent consideration |  | 0
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investments |  | 0
Available for sale securities | 0 | 0
Contingent consideration |  | 0
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market investments |  | 0
Available for sale securities | $ 0 | 0
Contingent consideration |  | $ (4,705)

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