Investments (Tables)

6 Months Ended

Jun. 30, 2017

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, 2017, and December 31, 2016:

AVAILABLE-FOR-SALE INVESTMENTS
June 30, 2017
(in thousands)
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	12,410	$	—	$	—		$	12,410
US Treasury securities	7,041		—		(16		)	7,025
US Agency securities	4,516		—		(17		)	4,499
Commercial paper	5,141		—		—			5,141
Asset-backed securities	5,027		—		(1		)	5,026
Corporate notes and bonds	38,547		—		(39		)	38,508
Total	$	72,682	$	—	$	(73	)	$	72,609

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

Schedule of Available-For-Sale Investment Maturities

The following table summarizes the maturities of the Company’s available-for-sale securities at June 30, 2017, and December 31, 2016:

AVAILABLE-FOR-SALE INVESTMENT MATURITIES
(in thousands)
	June 30, 2017				December 31, 2016
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than 1 year	$	57,292	$	57,246	$	45,391	$	45,344
Due in 1-5 years	15,390		15,363		13,204		13,175
Total	$	72,682	$	72,609	$	58,595	$	58,519