Balance Sheet Components (Fair Value of Available-For-Sale Investments) (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 107,981,000
Gross Unrealized Losses	(2,000)
Estimated Fair Value	107,979,000	$ 0
Money Market Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	86,745,000
Estimated Fair Value	86,745,000
Commercial Paper [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,271,000
Estimated Fair Value	6,271,000
U.S. Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	14,965,000
Gross Unrealized Losses	(2,000)
Estimated Fair Value	14,963,000
Cash Equivalents [Member]
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	86,745,000
Short-Term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	$ 21,234,000

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

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