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Fair Value of Financial Assets and Liabilities - Summary of Assets and Liabilities Recorded and Measured at Fair Value (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities | $ 0 | $ 1,648
Total Assets |  | 1,648
Supplemental profit sharing plan | 6,059 | 4,946
Earn-out | 581 |
Total Liabilities | 6,640 | 4,946
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities |  | 1,648
Total Assets |  | 1,648
Supplemental profit sharing plan | 0 | 0
Earn-out | 0 |
Total Liabilities | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities |  | 0
Total Assets |  | 0
Supplemental profit sharing plan | 6,059 | 4,946
Earn-out | 0 |
Total Liabilities | 6,059 | 4,946
Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Marketable securities |  | 0
Total Assets |  | 0
Supplemental profit sharing plan | 0 | 0
Earn-out | 581 |
Total Liabilities | $ 581 | $ 0

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