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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
 3 Months Ended 4 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 26, 2021
Jun. 30, 2021
Sep. 27, 2020
Dec. 31, 2020
Jun. 30, 2021
Sep. 26, 2021
Sep. 27, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
FDIC insured amount       $ 250,000       $ 250,000              
Cash balance in foreign bank accounts       4,607,000       4,607,000 $ 206,000            
Impairment charges                   $ 0          
Amortization expense $ 3,553,000   $ 2,699,000     $ 10,391,000 $ 8,099,000 11,082,000 10,456,000 4,434,000          
Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months                             $ 13,421
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two                           $ 13,421  
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three                         $ 13,258    
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four                       $ 12,444      
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five                     $ 12,444        
Debt Issuance Costs $ 12,600,000     16,684,000   12,600,000   16,684,000 15,065,000            
Amortization of Debt Issuance Costs               $ 3,092 3,097 3,797          
Effective Income Tax Rate Reconciliation, Percent 9.90%   28.90%       23.80% 50.00%              
Income Tax Examination, Penalties and Interest Accrued       0       $ 0 0            
Unrecognized Tax Benefits       0       0 0            
Total advertising expenses               4,379 3,921 997          
Research and Development Expense, Total $ 7,133,000   $ 5,982,000     $ 20,167,000 $ 17,198,000 23,483,000 20,630,000 6,802,000          
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax                 397            
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax       $ 16,000       16,000              
Other expense               284 $ 27 $ 590          
Empower Ltd [Member]                              
Warrants to purchase       13,000,000 13,000,000                    
FDIC insured amount   $ 250,000   $ 250,000 $ 250,000     $ 250,000              
Other expense   $ (11,203,841)   $ (4,169,979) $ (11,283,973)                    
Dilutive securities       0 0                    
Maximum [Member]                              
Intangible Assets, Remaining Amortization Period               25 years              
Maximum [Member] | Building [Member]                              
Property, Plant and Equipment, Estimated Useful Lives               twenty-five              
Maximum [Member] | Building Improvements [Member]                              
Property, Plant and Equipment, Estimated Useful Lives               ten              
Minimum [Member]                              
Intangible Assets, Remaining Amortization Period               10 years              
Minimum [Member] | Building [Member]                              
Property, Plant and Equipment, Estimated Useful Lives               ten years              
Minimum [Member] | Building Improvements [Member]                              
Property, Plant and Equipment, Estimated Useful Lives               three              
Technology-Based Intangible Assets [Member]                              
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax       $ 690       $ 690              
Technology-Based Intangible Assets [Member] | Maximum [Member]                              
Intangible Assets, Remaining Amortization Period               14 years              
Technology-Based Intangible Assets [Member] | Minimum [Member]                              
Intangible Assets, Remaining Amortization Period               5 years              
Trade Names [Member]                              
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax       $ 16       $ 16              
Trade Names [Member] | Maximum [Member]                              
Intangible Assets, Remaining Amortization Period               20 years              
Trade Names [Member] | Minimum [Member]                              
Intangible Assets, Remaining Amortization Period               15 years