Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Measurements

Schedule of the Company's financial assets and liabilities that have been measured at fair value on a recurring basis

Description	Total		Level 1		Level 2		Level 3
	(in thousands)
December 31, 2014
Assets:
Money market funds	$	357	$	357	$	—	$	—
Available-for-sale securities:
Certificates of deposit		4,782		4,782		—		—
U.S. treasury notes		11,513		11,513		—		—
U.S. government agency securities		40,249		—		40,249		—
Total assets at fair value	$	56,901	$	16,652	$	40,249	$	—
December 31, 2013
Assets:
Money market funds	$	5,356	$	5,356	$	—	$	—
Available-for-sale securities:
Certificates of deposit		238		238		—		—
U.S. treasury notes		11,188		11,188		—		—
U.S. government agency securities		9,637		—		9,637		—
Total assets at fair value	$	26,419	$	16,782	$	9,637	$	—