Investments - Amortized Cost of Unrealized Gains and Losses and Fair Value of Investments (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 102,636,000	$ 99,943,000
Unrealized Gain	0	0
Unrealized Loss	(451,000)	(109,000)
Fair Value	$ 102,185,000	$ 99,834,000
Weighted-average maturity of short-term investments	6 months	4 months 24 days
Debt securities, available-for-sale, credit loss	$ 0		$ 0
Corporate bonds and notes—short-term | Minimum
Debt Securities, Available-for-sale [Line Items]
Range of maturities	1 month	1 month
Corporate bonds and notes—short-term | Maximum
Debt Securities, Available-for-sale [Line Items]
Range of maturities	12 months	12 months
Corporate bonds and notes—long-term
Debt Securities, Available-for-sale [Line Items]
Weighted-average maturity of short-term investments		1 year 2 months 12 days
Corporate Debt Securities | Corporate bonds and notes—short-term
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 102,636,000	$ 75,896,000
Unrealized Gain	0	0
Unrealized Loss	(451,000)	(26,000)
Fair Value	$ 102,185,000	75,870,000
Corporate Debt Securities | Corporate bonds and notes—long-term
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		24,047,000
Unrealized Gain		0
Unrealized Loss		(83,000)
Fair Value		$ 23,964,000