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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
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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 |

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