Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 31, 2019

Cash and Cash Equivalents [Abstract]

Schedule of fair value of securities, not including cash

The following tables summarize the gross unrealized gains and losses of the Company’s marketable securities as of December 31, 2019 and December 31, 2018:

	December 31, 2019
			Gross Unrealized
	Amortized Cost		Gains		Losses		Estimated Fair Value
Money market funds	$	5,381	$	—	$	—	$	5,381
Commercial paper	11,892		—		—		11,892
Corporate notes	18,369		11		—		18,380
U.S. government securities	11,291		4		—		11,295
U.S. asset-backed securities	10,503		6		—		10,509
	$	57,436	$	21	$	—	$	57,457
Classified as:
Cash equivalents							$	5,381
Short term investments							42,829
Long term investments							9,247
							$	57,457

	December 31, 2018
			Gross Unrealized
(In thousands)	Amortized Cost		Gains		Losses			Fair Value
Money market funds	$	5,838	$	—	$	—		$	5,838
Repurchase agreements	5,000		—		—			5,000
Commercial paper	30,710		—		—			30,710
Corporate notes	13,168		—		(24		)	13,144
U.S. government securities	10,167		—		(1		)	10,166
U.S. asset-backed securities	10,632		—		(14		)	10,618
	$	75,515	$	—	$	(39	)	$	75,476
Classified as:
Cash equivalents								$	10,838
Short-term investments								64,638
								$	75,476