Short-Term Investments (Tables)

12 Months Ended

Dec. 31, 2016

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, 2016
Corporate bonds	$	6,928	$	—	$	(5	)	$	6,923
Total short-term investments	$	6,928	$	—	$	(5	)	$	6,923
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

Maturities of Short-Term Investments

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

	December 31,
	2016		2015
Less than one year	$	6,923	$	19,642
Due in 1 - 2 years	—		6,962
Total short-term investments	$	6,923	$	26,604