Marketable Securities - Summary of Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Marketable securities:
Amortized Cost Basis	$ 65,687
Unrealized Gains	143
Fair Value	65,830	$ 90,791
US Government
Marketable securities:
Amortized Cost Basis	20,448
Unrealized Gains	124
Fair Value	20,572
Corporate Bonds
Marketable securities:
Amortized Cost Basis	14,826
Unrealized Gains	19
Fair Value	14,845
Money Market Funds
Marketable securities:
Amortized Cost Basis	30,413
Fair Value	$ 30,413

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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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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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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