Cash, Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 31, 2019

Cash and Cash Equivalents [Abstract]

Summary of Cash, Cash Equivalents and Investments

A summary of the cash equivalents and investments as of December 31, 2019 is as follows:

Cash Equivalents:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	14,518	$	—	$	—	$	14,518

Investments:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate bonds and commercial paper	$	32,216	$	110	$	(1	)	$	32,325

A summary of the cash equivalents and investments as of December 31, 2018 is as follows:

Cash Equivalents:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	54,599	$	—	$	—	$	54,599

Investments:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	22,330	$	—	$	(37	)	$	22,293
Corporate bonds and commercial paper	44,812		—		(78		)	44,734
Certificates of deposit	1,952		—		—			1,952
	$	69,094	$	—	$	(115	)	$	68,979

Investments Classified by Contractual Maturity Date

The following table summarizes the estimated fair value of the Company's investments, designated as available-for-sale and classified by the contractual maturity date of the investments as of the dates shown:

	December 31,
	2019		2018
Due within one year or less	$	29,789	$	61,514
Due after one year through five years	2,536		7,465
	$	32,325	$	68,979

Schedule of Fair Values and Gross Unrealized Losses for Available-for-sale Securities

The following table shows the fair values and the gross unrealized losses of these available-for-sale investments aggregated by investment category as of December 31, 2019:

	Adjusted Cost		Gross Unrealized Loss			Fair Value
Corporate bonds and commercial paper	$	2,537	$	(1	)	$	2,536

The following table shows the fair values and the gross unrealized losses of these available-for-sale investments aggregated by investment category as of December 31, 2018:

	Adjusted Cost		Gross Unrealized Loss			Fair Value
U.S. government agency bonds	$	22,330	$	(37	)	$	22,293
Corporate bonds and commercial paper	44,812		(78		)	44,734
	$	67,142	$	(115	)	$	67,027