Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Assets measured at fair value on a recurring basis

Assets measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014 were as follows (in thousands):

	June 30, 2015
	Level 1		Level 2		Level 3		Total
Cash Equivalents
Money market funds	$	17,083	$	—	$	—	$	17,083
Commercial paper	—		6,498		—		6,498
Corporate bonds	—		6,037		—		6,037
Total cash equivalents	17,083		12,535		—		29,618
Available-for-Sale Securities
Certificates of deposit(1)	—		24,523		—		24,523
Commercial paper	—		2,999		—		2,999
Corporate bonds	—		22,226		—		22,226
Total available-for-sale securities	—		49,748		—		49,748
Total assets measured at fair value	$	17,083	$	62,283	$	—	$	79,366

⁽¹⁾ All certificates of deposit are within current FDIC insurance limits.

	December 31, 2014
	Level 1		Level 2		Level 3		Total
Cash Equivalents
Money market funds	$	2,591	$	—	$	—	$	2,591
Certificates of deposit(1)	—		980		—		980
Commercial paper	—		12,497		—		12,497
Variable rate demand notes	—		8,000		—		8,000
Total cash equivalents	2,591		21,477		—		24,068
Available-for-Sale Securities
Certificates of deposit(1)	—		14,202		—		14,202
Corporate bonds	—		12,782		—		12,782
Total available-for-sale securities	—		26,984		—		26,984
Total assets measured at fair value	$	2,591	$	48,461	$	—	$	51,052

⁽¹⁾ All certificates of deposit are within current FDIC insurance limits.