Cash, Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 31, 2019

Cash and Cash Equivalents [Abstract]

Schedule of Cash Equivalents and Investments

The following table presents the cash equivalents and investments carried at fair value in accordance with the hierarchy defined in Note 2 atDecember 31, 2019 and 2018(in thousands):

	Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
December 31, 2019
Money market funds, included in cash equivalents	$	47,384	$	47,384	$	—	$	—
Investments - US treasuries	5,300		5,300		—		—
Investments - Asset-backed securities	7,950		—		7,950		—
Investments - Corporate bonds	28,644		—		28,644		—
Total	$	89,278	$	52,684	$	36,594	$	—

	Total		Quoted prices in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
December 31, 2018
Money market funds, included in cash equivalents	$	7,791	$	7,791	$	—	$	—
Corporate bonds, included in cash equivalents	10,910		—		10,910		—
Investments - US treasuries	7,518		7,518		—		—
Investments - Asset-backed securities	5,758		—		5,758		—
Investments - Corporate bonds	39,964		—		39,964		—
Total	$	71,941	$	15,309	$	56,632	$	—

nvestments at December 31, 2019 consist of the following (in thousands):

	Contractual maturity (in days)	Amortized Cost		Unrealized gains		Unrealized losses			Fair Value
Investments
US treasuries	46-182	$	5,293	$	25	$	(18	)	$	5,300
Asset-backed securities	49-106	7,962		12		(24		)	7,950
Corporate bonds	2-204	28,709		20		(85		)	28,644
Total		$	41,964	$	57	$	(127	)	$	41,894

Investments at December 31, 2018 consist of the following (in thousands):

	Contractual maturity (in days)	Amortized Cost		Unrealized gains		Unrealized losses			Fair Value
Investments
US treasuries	150-164	$	7,541	$	—	$	(23	)	$	7,518
Asset-backed securities	196-259	5,766		1		(9		)	5,758
Corporate bonds	73-252	40,072		3		(111		)	39,964
Total		$	53,379	$	4	$	(143	)	$	53,240