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Basis of Presentation and Description of Business - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Nov. 06, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]        
Net proceeds from initial offering after deducting underwriting discounts and commissions   $ 0 $ 0 $ 117,337
IPO | Class A Common Stock        
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]        
Shares issued under IPO (in shares) 10,416,666      
Sale of stock price per share (in dollars per share) $ 12.00      
Net proceeds from initial offering after deducting underwriting discounts and commissions $ 117,300      
Funko Acquisition Holdings, L.L.C. | Common Units        
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]        
Number of shares sold (in shares) 10,416,666      
Funko Holdings LLC | Funko Acquisition Holdings, L.L.C.        
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]        
Ownership percentage   100.00%    
Funko Holdings LLC | Funko Acquisition Holdings, L.L.C. | Funko LLC        
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]        
Ownership percentage   100.00%