Short-Term Investments (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Summary of Short-Term Investments

The following table summarizes the Company’s short-term investments (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
As of December 31, 2015
Corporate bonds	$	25,557	$	—	$	(52	)	$	25,505
Commercial paper	1,099		—		—			1,099
Total short-term investments	$	26,656	$	—	$	(52	)	$	26,604
As of December 31, 2014
State, municipal and local government agencies bonds	$	13,946	$	16	$	(1	)	$	13,961
Corporate bonds	17,899		3		(16		)	17,886
Total short-term investments	$	31,845	$	19	$	(17	)	$	31,847

Maturities of Short-Term Investments

The following table summarizes the maturities of the Company’s short-term investments (in thousands):

	December 31,
	2015		2014
Less than one year	$	19,642	$	30,946
Due in 1 - 2 years	6,962		901
Total short-term investments	$	26,604	$	31,847