Summary of Significant Accounting Policies (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) Institution	Dec. 31, 2021 USD ($)
Concentration of Credit Risk and Others Risks and Uncertainties [Abstract]
Number of financial institutions holding company's cash | Institution	2
Stock-Based Compensation [Abstract]
Option vesting term	4 years
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Adjusted Cost	$ 161,991	$ 169,322
Fair Value	161,660	169,272
Cash [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Adjusted Cost	27,934	35,428
Fair Value	27,934	35,428
Total Investment Securities [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Adjusted Cost	134,057	133,894
Unrealized Gains	4	0
Unrealized Losses	(335)	(50)
Fair Value	133,726	133,844
Mutual Funds [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Adjusted Cost	64,782	106,590
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	64,782	106,590
U. S. Agency Securities [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Adjusted Cost	46,341	16,658
Unrealized Gains	1	0
Unrealized Losses	(211)	(26)
Fair Value	46,131	16,632
U.S. Treasury Securities [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Adjusted Cost	22,934	10,646
Unrealized Gains	3	0
Unrealized Losses	(124)	(24)
Fair Value	$ 22,813	10,622
Minimum [Member]
Property and Equipment [Abstract]
Useful lives	5 years
Intangible Assets [Abstract]
Estimated useful lives	3 years
Maximum [Member]
Property and Equipment [Abstract]
Useful lives	7 years
Intangible Assets [Abstract]
Estimated useful lives	15 years
Recurring [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Cash and Cash Equivalents	$ 127,178	142,018
Investments Available for Sale	34,482	27,254
Recurring [Member] | Cash [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Cash and Cash Equivalents	27,934	35,428
Recurring [Member] | Level 1 [Member] | Total Investment Securities [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Cash and Cash Equivalents	99,244	106,590
Investments Available for Sale	34,482	27,254
Recurring [Member] | Level 1 [Member] | Mutual Funds [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Cash and Cash Equivalents	64,782	106,590
Investments Available for Sale	0	0
Recurring [Member] | Level 1 [Member] | U. S. Agency Securities [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Cash and Cash Equivalents	21,975	0
Investments Available for Sale	24,156	16,632
Recurring [Member] | Level 1 [Member] | U.S. Treasury Securities [Member]
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets [Abstract]
Cash and Cash Equivalents	12,487	0
Investments Available for Sale	$ 10,326	$ 10,622
Highly Liquid Debt Investments [Member] | Maximum [Member]
Investments [Abstract]
Contractual maturities of investment securities	2 years