Investments (Tables)

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Investments

The following tables summarize the Company’s available-for-sale investments at June 30, 2016 and December 31, 2015:

AVAILABLE-FOR-SALE INVESTMENTS
June 30, 2016
(in thousands)
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	6,028	$	—	$	—		$	6,028
US Treasury securities	15,780		42		—			15,822
US Agency securities	4,009		1		—			4,010
Commercial paper	499		—		—			499
Asset-backed securities	7,084		11		—			7,095
Corporate notes and bonds	31,449		27		(11		)	31,465
Total	$	64,849	$	81	$	(11	)	$	64,919

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

Schedule of Available-For-Sale Investment Maturities

The following table summarizes the maturities of the Company’s available-for-sale securities at June 30, 2016 and December 31, 2015:

AVAILABLE-FOR-SALE INVESTMENT MATURITIES
(in thousands)
	June 30, 2016				December 31, 2015
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than 1 year	$	27,517	$	27,535	$	11,851	$	11,839
Due in 1-5 years	37,332		37,384		—		—
Due in 6-10 years	—		—		—		—
Total	$	64,849	$	64,919	$	11,851	$	11,839