Investments (Tables)

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-sale Investments

The following tables summarize the Company’s available-for-sale investments at December 31, 2016, and 2015 (in thousands):

AVAILABLE-FOR-SALE INVESTMENTS
December 31, 2016
(in thousands)
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	7,257	$	—	$	—		$	7,257
US Treasury securities	8,553		1		(10		)	8,544
US Agency securities	4,514		—		(13		)	4,501
Asset-backed securities	5,554		3		—			5,557
Corporate notes and bonds	32,717		3		(60		)	32,660
Total	$	58,595	$	7	$	(83	)	$	58,519

AVAILABLE-FOR-SALE INVESTMENTS
December 31, 2015
(in thousands)
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Asset-backed securities	$	2,510	$	—	$	(3	)	$	2,507
Corporate notes and bonds	9,341		1		(10		)	9,332
Total	$	11,851	$	1	$	(13	)	$	11,839

Summary of Maturities of Available-for-sale Investments

The following table summarizes the maturities of the Company’s available-for-sale securities at December 31, 2016, and 2015 (in thousands):

AVAILABLE-FOR-SALE INVESTMENT MATURITIES
(in thousands)
	At December 31, 2016				At December 31, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than 1 year	$	45,391	$	45,344	$	11,851	$	11,839
Due in 1-5 years	13,204		13,175		—		—
Total	$	58,595	$	58,519	$	11,851	$	11,839