Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value Based on Three-Tier Fair Value Hierarchy

The following table sets forth the fair value of the Company’s financial assets and liabilities measured at fair value based on the three-tier fair value hierarchy (in thousands):

	Level 1		Level 2		Level 3		Total
As of December 31, 2015
Cash equivalents
Money market funds	$	53,434	$	—	$	—	$	53,434
U.S. Treasury bills	24,998		—		—		24,998
Short-term investments
Corporate bonds	—		25,505		—		25,505
Commercial paper	—		1,099		—		1,099
Prepaids and other current assets
Time deposit pledged for credit card facility			580				580
Derivative assets	—		113		—		113
Other assets
Long-term investment	1,840		—		—		1,840
Total assets measured and recorded at fair value	$	80,272	$	27,297	$	—	$	107,569
Accrued liabilities
Derivative liabilities	$	—	$	371	$	—	$	371
Total liabilities measured and recorded at fair value	$	—	$	371	$	—	$	371

	Level 1		Level 2		Level 3		Total
As of December 31, 2014
Cash equivalents
Money market funds	$	23,121	$	—	$	—	$	23,121
Short-term investments
State, municipal and local government agencies bonds	—		13,961		—		13,961
Corporate bonds	—		17,886		—		17,886
Prepaids and other current assets
Derivative assets	—		341		—		341
Other assets
Long-term investment	2,606		—		—		2,606
Total assets measured and recorded at fair value	$	25,727	$	32,188	$	—	$	57,915
Accrued liabilities
Derivative liabilities	$	—	$	7	$	—	$	7
Total liabilities measured and recorded at fair value	$	—	$	7	$	—	$	7