Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Summary of Fair Value of Financial Assets and Liabilities that are Measured at Fair Value and the Classification by Level of Input within Fair Value Hierarchy

The following tables summarize the fair value of financial assets and liabilities that are measured at fair value and the classification by level of input within the fair value hierarchy:

	FAIR VALUE MEASUREMENTS AS OF JUNE 30, 2016
(in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents:
Cash and money market accounts	$	55,621	$	—	$	—	$	55,621
Commercial paper	—		1,498		—		1,498
Government agencies	—		1,400		—		1,400
Total cash and cash equivalents	$	55,621	$	2,898	$	—	$	58,519
Investments:
Certificates of deposit	$	—	$	14,612	$	—	$	14,612
Commercial paper	—		6,494		—		6,494
Corporate bonds	—		27,987		—		27,987
Government agencies	—		4,524		—		4,524
Total investments	$	—	$	53,617	$	—	$	53,617
Total cash, cash equivalents, and investments	$	55,621	$	56,515	$	—	$	112,136

	FAIR VALUE MEASUREMENTS AS OF DECEMBER 31, 2015
(in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents:
Cash and money market accounts	$	91,060	$	—	$	—	$	91,060
Total cash and cash equivalents	$	91,060	$	—	$	—	$	91,060
Investments:
Certificates of deposit	$	—	$	18,355	$	—	$	18,355
Commercial paper	—		5,966		—		5,966
Corporate bonds	—		32,995		—		32,995
Government agencies	—		1,994		—		1,994
Total investments	$	—	$	59,310	$	—	$	59,310
Total cash, cash equivalents, and investments	$	91,060	$	59,310	$	—	$	150,370