Debt Instrument Accordion Feature

No definition available.

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

- Definition

Debt instrument additional basis spread.

+ References

No definition available.

+ Details

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Namespace Prefix:	fnko_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Long term debt maturities percentage fifth and sixth year.

+ References

No definition available.

+ Details

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Namespace Prefix:	fnko_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Long term debt maturities percentage first and second year.

+ References

No definition available.

+ Details

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Namespace Prefix:	fnko_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Long term debt maturities percentage third and fourth year.

+ References

No definition available.

+ Details

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Namespace Prefix:	fnko_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentInterestRateIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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+ Details

Name:	us-gaap_LinesOfCreditCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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+ Details

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- Details

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- Details

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- Details

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- Details

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Debt - Former and New Credit Facilities - Additional Information (Detail) - USD ($)				1 Months Ended	12 Months Ended
	Sep. 17, 2021	Sep. 23, 2019	Oct. 22, 2018	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 11, 2019
Debt Instrument [Line Items]
Interest rate decrease		0.75%
Gain (loss) on extinguishment of debt					$ (675,000)	$ 0	$ 0
Long-term debt					173,213,000	190,770,000
SONIA Rate
Debt Instrument [Line Items]
Interest rate margins	2.50%
Prime Rate
Debt Instrument [Line Items]
Interest rate margins	1.50%
Supplementary leverage ratio	0.25%
Interest rate	0.00%
Interest rate of borrowings	0.00%
Letters of Credit
Debt Instrument [Line Items]
Line of credit					0	0
Secured Debt
Debt Instrument [Line Items]
Face amount	$ 180,000,000		$ 235,000,000
Debt instrument accordion feature		$ 25,000,000
Long term debt maturity percentage first and second year	2.50%		5.00%
Long term debt maturity percentage third and fourth year			10.00%
Long term debt maturities percentage fifth year			12.50%
Repayments of long-term debt				$ 180,100,000
Gain (loss) on extinguishment of debt				$ 700,000
Secured Debt \| Swing Rate
Debt Instrument [Line Items]
Interest rate margins		3.00%
Supplementary leverage ratio		0.25%
Secured Debt \| Base Rate
Debt Instrument [Line Items]
Interest rate margins		2.00%
Secured Debt \| Euro Rate
Debt Instrument [Line Items]
Interest rate		1.00%
Interest rate of borrowings		1.00%
Secured Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit			$ 50,000,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit	$ 100,000,000							$ 75,000,000
Line of credit					0
Line of credit facility, available borrowing capacity					$ 100,000,000	$ 75,000,000