Marketable Securities - Summary of Available-for-sale Securities (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Marketable Securities with unrecognized gains	$ 0
Cost
Debt Securities, Available-for-sale [Line Items]
Cost	10,992,000	$ 2,766,000
Cost | Certificates of deposit | Level 1
Debt Securities, Available-for-sale [Line Items]
Marketable Securities with unrecognized losses for less than 12 months	401,000	0
Marketable Securities with unrecognized gains	0	0
Cost	401,000	0
Cost | U.S. Treasury and agency notes | Level 2
Debt Securities, Available-for-sale [Line Items]
Marketable Securities with unrecognized losses for less than 12 months	1,360,000	0
Marketable Securities with unrecognized gains	0	801,000
Cost	1,360,000	801,000
Cost | Corporate notes | Level 2
Debt Securities, Available-for-sale [Line Items]
Marketable Securities with unrecognized losses for less than 12 months	9,231,000	708,000
Marketable Securities with unrecognized gains	0	1,257,000
Cost	9,231,000	1,965,000
Estimated Fair Value
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	10,983,000	2,771,000
Estimated Fair Value | Certificates of deposit | Level 1
Debt Securities, Available-for-sale [Line Items]
Marketable Securities with unrecognized losses for less than 12 months	400,000	0
Marketable Securities with unrecognized gains	0	0
Estimated Fair Value	400,000	0
Estimated Fair Value | U.S. Treasury and agency notes | Level 2
Debt Securities, Available-for-sale [Line Items]
Marketable Securities with unrecognized losses for less than 12 months	1,358,000	0
Marketable Securities with unrecognized gains	0	803,000
Estimated Fair Value	1,358,000	803,000
Estimated Fair Value | Corporate notes | Level 2
Debt Securities, Available-for-sale [Line Items]
Marketable Securities with unrecognized losses for less than 12 months	9,225,000	707,000
Marketable Securities with unrecognized gains	0	1,261,000
Estimated Fair Value	$ 9,225,000	$ 1,968,000