Short-term Investments - Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 214,911	$ 242,140
Gross unrealized gains	0	5
Gross unrealized losses	(1,293)	(324)
Fair value	213,618	241,821
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	142,862	177,375
Gross unrealized gains	0	3
Gross unrealized losses	(873)	(195)
Fair value	141,989	177,183
Government-related debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	40,574	33,134
Gross unrealized gains	0	2
Gross unrealized losses	(345)	(97)
Fair value	40,229	33,039
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	31,475	31,631
Gross unrealized gains	0	0
Gross unrealized losses	(75)	(32)
Fair value	$ 31,400	$ 31,599

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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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563

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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).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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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
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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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), classified as current.

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-Name Accounting Standards Codification
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