Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 157,640	$ 0
Gross Unrealized Gains	14	0
Gross Unrealized Losses	(5)	0
Fair Value	157,649	0
Treasury securities \| Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,038	0
Gross Unrealized Gains	0
Gross Unrealized Losses	(2)	0
Fair Value	10,036	0
Corporate debt securities \| Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	127,003	0
Gross Unrealized Gains	13	0
Gross Unrealized Losses	(3)	0
Fair Value	127,013	0
Agency securities \| Agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,599	0
Gross Unrealized Gains	1	0
Gross Unrealized Losses	0	0
Fair Value	$ 20,600	$ 0

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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