Short-term marketable securities (Tables)

3 Months Ended

Mar. 31, 2020

Short-term marketable securities

Schedule of short-term marketable securities

	March 31, 2020
	Amortized cost		Gross unrealized gains		Gross unrealized losses		Fair value
Money market funds	$	32,733	$	—	$	—	$	32,733
Commercial paper		46,509		—		—		46,509
U.S. treasury securities		12,058		83		—		12,141
Corporate debt securities		19,428		—		(38)		19,390
	$	110,728	$	83	$	(38)	$	110,773
Cash and cash equivalents							$	32,733
Short-term marketable securities								78,040
							$	110,773
	December 31, 2019
	Amortized cost		Gross unrealized gains		Gross unrealized losses		Fair value
Money market funds	$	49,948	$	—	$	—	$	49,948
Commercial paper		49,114		—		—		49,114
U.S. treasury securities		6,048		—		—		6,048
Corporate debt securities		20,149		—		(6)		20,143
	$	125,259	$	—	$	(6)	$	125,253
Cash and cash equivalents							$	53,641
Short-term marketable securities								71,612
							$	125,253