Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Schedule of Fair Value Hierarchy of Financial Assets and Liabilities Carried at Fair Value and Measured on Recurring Basis

The fair value hierarchy of the Company's financial assets carried at fair value and measured on a recurring basis was as follows (in thousands):

	December 31, 2015		Fair value measurements at the reporting date using
			Quoted prices in active markets using identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents:
Money market and other funds	$	5,410	$	—	$	5,410	$	—
Available-for-sale investments:
Debt securities:
U.S. government securities	11,301		—		11,301		—
Total assets at fair value	$	16,711	$	—	$	16,711	$	—
Contingent consideration liability	$	2,951	$	—	$	—	$	2,951
Total liabilities at fair value	$	2,951	$	—	$	—	$	2,951

	December 31, 2014		Fair value measurements at the reporting date using
			Quoted prices in active markets using identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents:
Money market and other funds	$	8,322	$	—	$	8,322	$	—
Time deposits	1,242		—		1,242		—
Taxable municipal bonds	4,754		—		4,754		—
Total cash equivalents	14,318		—		14,318		—
Available-for-sale investments:
Debt securities:
U.S. government securities	100,818		—		100,818		—
International government securities	6,560		—		6,560		—
Commercial paper	24,589		—		24,589		—
Time deposits	30,759		—		30,759		—
Corporate bonds	1,528		—		1,528		—
Taxable municipal bonds	87,366		—		87,366		—
Total debt securities	251,620		—		251,620		—
Total assets at fair value	$	265,938	$	—	$	265,938	$	—

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

A reconciliation of changes in Level 3 items measured at fair value on a recurring basis was as follows (in thousands):

Contingent consideration liability:
Balance as of December 31, 2014	$	—
Initial estimate upon acquisition	3,274
Foreign currency transaction gain	(323		)
Balance as of December 31, 2015	$	2,951

Investments Classified as Available-for-Sale

The cost and fair value of available-for-sale investments were as follows (in thousands):

	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Balance as of December 31, 2015	$	11,316	$	—	$	(15	)	$	11,301
Balance as of December 31, 2014	$	251,673	$	16	$	(69	)	$	251,620