Debt Instrument, maturity month and year.

No definition available.

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Namespace Prefix:	genk_
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Balance Type:	na
Period Type:	duration

- Definition

Debt instrument, payment period.

+ References

No definition available.

+ Details

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Namespace Prefix:	genk_
Data Type:	xbrli:durationItemType
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.

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Balance Type:	na
Period Type:	duration

- Definition

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

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

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- 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.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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- Definition

Indicates type of variable interest rate on debt instrument.

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- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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- Details

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Notes Payable - Additional Information (Details) - USD ($)				1 Months Ended	3 Months Ended	6 Months Ended
	Oct. 27, 2025	Jul. 29, 2025	Apr. 25, 2025	Aug. 31, 2017	Sep. 30, 2024	Jun. 30, 2026	Dec. 31, 2025
Notes Payable [Line item]
Loan agreement, balance						$ 11,966,000
Economic Injury Disaster Loan
Notes Payable [Line item]
Loan agreement						$ 4,200,000	$ 4,300,000
Loan agreement, interest rate						3.75%
Loan agreement, frequency of payment						monthly
Loan, payment period						30 years
Notes Payable to Bank \| Commercial Bank Loan Agreement One
Notes Payable [Line item]
Loan agreement					$ 3,000,000
Loan agreement, maturity date					Jun. 26, 2026
Loan agreement, interest rate						7.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]					us-gaap:PrimeRateMember
Loan agreement, balance						$ 0
Loan agreement, variable interest rate					0.25%
Notes Payable to Bank \| Pacific City Bank \| Commercial Bank Loan Agreement Two
Notes Payable [Line item]
Loan agreement			$ 2,000,000
Loan agreement, maturity date			Apr. 25, 2027
Loan agreement, interest rate						7.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]			us-gaap:PrimeRateMember
Loan agreement, balance						$ 1,000,000
Loan agreement, variable interest rate			0.25%
Notes Payable to Bank \| Pacific City Bank \| Commercial Bank Loan Agreement Three
Notes Payable [Line item]
Loan agreement		$ 4,000,000
Loan agreement, maturity date		Jul. 29, 2027
Loan agreement, interest rate						7.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:PrimeRateMember
Loan agreement, balance						$ 2,600,000
Loan agreement, variable interest rate		0.25%
Notes Payable to Bank \| Pacific City Bank \| Commercial Bank Loan Agreement Four
Notes Payable [Line item]
Loan agreement	$ 4,000,000
Loan agreement, maturity date	Oct. 27, 2027
Loan agreement, interest rate						7.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:PrimeRateMember
Loan agreement, balance						$ 4,000,000
Loan agreement, variable interest rate	0.25%
Note Payable to Landlord
Notes Payable [Line item]
Loan agreement, interest rate				8.00%
Loan agreement, balance						$ 98,000	$ 133,000
Debt instrument maturity month and year				2027-07