Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis (Details)

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Fair Value Measurements - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Transfers between Levels    
Transfer into Level 3   $ 0
Transfer out of Level 3 $ 2,310,000 0
Level 1 to Level 2 transfers, Assets   0
Level 2 to Level 1 transfers, Assets   0
Level 1 to Level 2 transfers, Liabilities   0
Level 2 to Level 1 transfers, Liabilities   0
Recurring    
Assets:    
Equity securities 774,000 1,693,000
Liabilities:    
Contingent consideration 8,075,000 75,000
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Equity securities 774,000  
Recurring | Significant Unobservable Inputs (Level 3)    
Assets:    
Equity securities   1,693,000
Liabilities:    
Contingent consideration $ 8,075,000 $ 75,000