Investments - Short-term Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Adjusted Cost	$ 154,981	$ 175,539
Unrealized Losses	(212)	(49)
Fair Value	154,769	175,490
Corporate bonds
Marketable Securities [Line Items]
Adjusted Cost	136,337	146,032
Unrealized Losses	(129)	(30)
Fair Value	136,208	146,002
Government bonds
Marketable Securities [Line Items]
Adjusted Cost	4,977
Unrealized Losses	(14)
Fair Value	4,963
Asset-backed bonds
Marketable Securities [Line Items]
Adjusted Cost	13,667	29,507
Unrealized Losses	(69)	(19)
Fair Value	$ 13,598	$ 29,488

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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