Stockholder's Equity - Additional Information (Detail) $ / shares in Units, $ in Millions				12 Months Ended
	Apr. 18, 2019 shares	Nov. 01, 2017 vote $ / shares shares	Oct. 23, 2017 shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares
Class of Stock [Line Items]
Shares authorized, annual increase, percent	2.00%
Award vesting period				4 years
Contractual terms				10 years
Options granted, weighted average grant date fair value (in dollars per share) | $ / shares				$ 9.26	$ 1.90	$ 8.35
Equity-based compensation | $				$ 13.0	$ 10.1	$ 13.0
Unrecognized equity-based compensation expense | $				$ 24.0
Equity-based compensation costs not yet recognized, remaining weighted average period				2 years 4 months 24 days
2017 Plan
Class of Stock [Line Items]
Options granted (in shares)				821,000
Common stock, shares reserved for future issuance (in shares)				736,917
2019 Plan
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)				1,077,464
Funko Acquisition Holdings, L.L.C.
Class of Stock [Line Items]
Equity-based compensation | $				$ 13.0	$ 10.0	$ 10.8
Amended and Restated Certificate of Incorporation
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)		20,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.0001
IPO | Funko Acquisition Holdings, L.L.C.
Class of Stock [Line Items]
Unvested common units to purchase profit interests converted to units (in shares)				1,901,327	0
IPO | Funko Acquisition Holdings, L.L.C. | Class A Units
Class of Stock [Line Items]
Options to purchase units converted to common units (in shares)				555,867,000
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)				200,000,000	200,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.0001	$ 0.0001
Number of vote per share | vote		1
Equity-based compensation costs not yet recognized, remaining weighted average period				2 years 7 months 6 days
Unrecognized equity-based compensation expense related to options to purchase units | $				$ 9.1
Class A Common Stock | Restricted Stock Unit Activity
Class of Stock [Line Items]
Equity-based compensation costs not yet recognized, remaining weighted average period				2 years 2 months 12 days
Unrecognized equity-based compensation expense related to unvested common units and restricted stock units | $				$ 15.0
Class A Common Stock | 2017 Plan
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)			5,518,518
Class A Common Stock | 2019 Plan
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)	3,000,000
Class A Common Stock | Funko Acquisition Holdings, L.L.C. | Class A Units
Class of Stock [Line Items]
Former equity owners indirect ownership interests exchanged for common units (in shares)		12,921,039
Class A Common Stock | Amended and Restated Certificate of Incorporation
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		200,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001
Class A Common Stock | IPO
Class of Stock [Line Items]
Options granted (in shares)			1,028,500
Class B Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)				50,000,000	50,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.0001	$ 0.0001
Number of vote per share | vote		1
Class B Common Stock | Amended and Restated Certificate of Incorporation
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		50,000,000
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001