Basis of Presentation and Summary of Significant Accounting Policies - Carrying Amounts and Fair Values of Company's Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 96,213	$ 114,665
Marketable securities – certificates of deposit	25,046	25,024
Equity securities	17,847	28,393
Total assets	145,033	173,497
Interest rate swaps		1,071
APCMG contingent consideration	1,000	1,000
Total liabilities	1,000	2,071
Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	4,270	4,270
Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,135	1,145
Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	522
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	96,213	114,665
Marketable securities – certificates of deposit	25,046	25,024
Equity securities	13,577	24,123
Total assets	134,836	163,812
Interest rate swaps		0
APCMG contingent consideration	0	0
Total liabilities	0	0
Level 1 | Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Level 1 | Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Level 1 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Marketable securities – certificates of deposit	0	0
Equity securities	4,270	4,270
Derivative assets		1,100
Total assets	5,927	5,415
Interest rate swaps		1,071
APCMG contingent consideration	0	0
Total liabilities	0	1,071
Level 2 | Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	0
Level 2 | Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,135	1,145
Level 2 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	522
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0	0
Marketable securities – certificates of deposit	0	0
Equity securities	0	0
Total assets	4,270	4,270
Interest rate swaps		0
APCMG contingent consideration	1,000	1,000
Total liabilities	1,000	1,000
Level 3 | Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	4,270	4,270
Level 3 | Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0	$ 0
Level 3 | Interest rate swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	$ 0