Earnings per Share - Schedule of Reconciliations of Numerators and Denominators Used to Compute Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 67,854	$ 9,763	$ 27,820
Less: net income attributable to non-controlling interests	23,954	5,802	16,095
Net income attributable to Funko, Inc.	43,900	3,961	11,725
Add: Reallocation of net income attributable to non- controlling interests from the assumed exchange of common units of FAH, LLC for Class A common stock	0	0	0
Net income attributable to Funko, Inc. — diluted	$ 43,900	$ 3,961	$ 11,725
Denominator:
Weighted-average shares of Class A common stock outstanding — basic (in shares)	38,392,390	35,270,795	30,897,569
Add: Dilutive common units of FAH, LLC that are convertible into Class A common stock (in shares)	1,990,728	194,891	964,059
Weighted-average shares of Class A common stock outstanding — diluted (in shares)	40,610,618	35,770,013	32,925,773
Earnings per share of Class A common stock — basic (in dollars per share)	$ 1.14	$ 0.11	$ 0.38
Earnings per share of Class A common stock — diluted (in dollars per share)	$ 1.08	$ 0.11	$ 0.36
Funko Acquisition Holdings, L.L.C.
Denominator:
Add: Dilutive common units of FAH, LLC that are convertible into Class A common stock (in shares)	227,500	304,327	1,064,145