Cash, Cash Equivalents and Available for Sale Securities (Tables)

9 Months Ended

Sep. 30, 2020

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Schedule of Available for Sale Securities

Available for sale securities, including carrying value and estimated fair values, are summarized as follows:

	As of September 30, 2020
	Amortized Cost	Gross Unrealized Gains	Gross Unrealized Losses	Fair Value
U.S. Treasury securities	45,220	1	—	45,221
Corporate debt securities	52,862	2	(5)	52,859
Asset-backed securities	10,220	3	—	10,223
Total	108,302	6	(5)	108,303

Schedule of Accumulated Other Comprehensive Income

The changes in other comprehensive income associated with the unrealized gain on available for sale securities during the three and nine months ended September 30, 2020 and 2019, respectively, were as follows:

	Three months ended September 30,				Nine Months Ended September 30, 2020
	2020		2019		2020		2019
Beginning balance	$	—	$	—	$	—	$	—
Current period changes in fair value before reclassifications, net of tax	1		—		1		—
Amounts reclassified from accumulated other comprehensive income, net of tax	—		—		—		—
Total other comprehensive income	1		—		1		—
Ending balance	$	1	$	—	$	1	$	—