Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets:
Marketable securities	$ 198,307	$ 32,068
Liabilities:
Transfers from Level 1 to Level 2	0	0
Transfers from Level 2 to Level 1	0	0
Transfers into or out of Level 3	0	0
Revaluation of contingent consideration	24,339	2,393	$ 734
Confluence
Liabilities:
Revaluation of contingent consideration	24,300
Recurring
Assets:
Cash equivalents	21,678	16,455
Marketable securities	198,307	32,068
Total assets measured at fair value	219,985	48,523
Liabilities:
Contingent consideration	28,400	4,061
Total liabilities measured at fair value	28,400	4,061
Recurring | Level 1
Assets:
Cash equivalents	21,678	14,955
Total assets measured at fair value	21,678	14,955
Recurring | Level 2
Assets:
Cash equivalents		1,500
Marketable securities	198,307	32,068
Total assets measured at fair value	198,307	33,568
Recurring | Level 3
Liabilities:
Contingent consideration	28,400	4,061
Total liabilities measured at fair value	$ 28,400	$ 4,061