Stockholder's Equity - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Funko Acquisition Holdings, L.L.C.
Class of Stock [Line Items]
Stock options, Outstanding (in shares)	552
Stock options, Exercised (in shares)	(116)
Stock options, Forfeited (in shares)	0
Stock options, Cancelled (in shares)	0
Stock options, Outstanding (in shares)	436	552
Stock options, Options exercisable (in shares)	436
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 0.41
Weighted Average Exercise Price, Exercised (in dollars per share)	0.31
Weighted Average Exercise Price, Outstanding (in dollars per share)	0.43	$ 0.41
Weighted Average Exercise Options exercisable (in dollars per share)	$ 0.43
Aggregate Intrinsic Value, Outstanding	$ 7,038
Aggregate Intrinsic Value, Exercised	2,408
Aggregate Intrinsic Value, Outstanding	7,299	$ 7,038
Aggregate Intrinsic Value, Options exercisable	$ 7,299
Remaining Contractual Life, Outstanding	3 years 10 months 13 days	4 years 10 months 28 days
Remaining Contractual Life, Options exercisable	3 years 10 months 13 days
2017 Plan
Class of Stock [Line Items]
Stock options, Outstanding (in shares)	1,853
Stock options, Granted (in shares)	1,073
Stock options, Exercised (in shares)	(115)
Stock options, Forfeited (in shares)	(128)
Stock options, Outstanding (in shares)	2,683	1,853
Stock options, Options exercisable (in shares)	839
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 12.79
Weighted Average Exercise Price, Granted (in dollars per share)	20.23
Weighted Average Exercise Price, Exercised (in dollars per share)	13.52
Weighted average Exercise Price, Forfeited (in dollars per share)	16.48
Weighted Average Exercise Price, Outstanding (in dollars per share)	15.55	$ 12.79
Weighted Average Exercise Options exercisable (in dollars per share)	$ 12.62
Aggregate Intrinsic Value, Outstanding	$ 1,950
Aggregate Intrinsic Value, Granted	0
Aggregate Intrinsic Value, Exercised	996
Aggregate Intrinsic Value, Forfeited	609
Aggregate Intrinsic Value, Outstanding	7,524	$ 1,950
Aggregate Intrinsic Value, Options exercisable	$ 3,875
Remaining Contractual Life, Outstanding	8 years 7 months 6 days	8 years 10 months 2 days
Remaining Contractual Life, Options exercisable	8 years 1 month 28 days