Basis of Presentation and Summary of Significant Accounting Policies - Carrying Amounts and Fair Values of Company's Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	$ 114,665	$ 115,769
Marketable securities – certificates of deposit	25,024	67,637
Marketable securities – equity securities	28,393	58
Total assets	173,497	183,464
Interest rate swaps	1,071
APCMG contingent consideration	1,000
Total liabilities	2,071
Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	4,270
Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	1,145
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	114,665	115,769
Marketable securities – certificates of deposit	25,024	67,637
Marketable securities – equity securities	24,123	58
Total assets	163,812	183,464
Interest rate swaps	0
APCMG contingent consideration	0
Total liabilities	0
Level 1 | Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	0
Level 1 | Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	0	0
Marketable securities – certificates of deposit	0	0
Marketable securities – equity securities	4,270	0
Warrants	1,100
Total assets	5,415	0
Interest rate swaps	1,071
APCMG contingent consideration	0
Total liabilities	1,071
Level 2 | Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	0
Level 2 | Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	1,145
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market accounts	0	0
Marketable securities – certificates of deposit	0	0
Marketable securities – equity securities	0	0
Total assets	4,270	$ 0
Interest rate swaps	0
APCMG contingent consideration	1,000
Total liabilities	1,000
Level 3 | Contingent Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	4,270
Level 3 | Warrants
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	$ 0