Debt - Schedule of Maturities of Long-term Debt (Detail) $ in Thousands	Dec. 31, 2023 USD ($)
Debt Disclosure [Abstract]
2024	$ 22,850
2025	23,134
2026	108,935
Total	$ 154,919

Long term debt maturities repayments of principal and interest in next twelve months.

No definition available.

Name:	fnko_LongTermDebtMaturitiesRepaymentsOfPrincipalAndInterestInNextTwelveMonths
Namespace Prefix:	fnko_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant