Marketable Securities (Details) $ in Thousands	Dec. 31, 2020 security	Dec. 31, 2019 USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of securities in an unrealized loss position \| security	0
Marketable securities
Amortized Cost		$ 37,414
Gross Unrealized Gains		25
Gross Unrealized Losses		0
Fair Value		37,439
Commercial paper
Marketable securities
Amortized Cost		11,940
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		11,940
Corporate bonds
Marketable securities
Amortized Cost		11,990
Gross Unrealized Gains		20
Gross Unrealized Losses		0
Fair Value		12,010
U.S. Treasuries
Marketable securities
Amortized Cost		13,484
Gross Unrealized Gains		5
Gross Unrealized Losses		0
Fair Value		$ 13,489

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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Amortized cost of 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 of 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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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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