Organization and Description of Business - Summary of List of Entities in Operation (Details)	12 Months Ended
	Dec. 31, 2024
GEN Tustin [Member] | GEN Restaurant Group LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Huntington Beach [Member] | GEN Restaurant Group LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Oxnard [Member] | GEN Restaurant Group LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Henderson [Member] | JC Group International Inc. (S Corp) [Member] | NV
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN West Covina [Member] | JC Group International Inc. (S Corp) [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Corona [Member] | JC Group International Inc. (S Corp) [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Glendale [Member] | GEN Restaurant Investment LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Fullerton [Member] | GEN California LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Mira Mesa [Member] | GEN California LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Tempe [Member] | GEN Arizona LLC [Member] | AZ
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Chandler [Member] | GEN Chandler LLC [Member] | AZ
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Sahara [Member] | GEN Nevada LLC [Member] | NV
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Miracle Mile [Member] | GEN Nevada LLC [Member] | NV
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Alhambra [Member] | GEN Alhambra LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Arlington [Member] | GEN Arlington, LP [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Cerritos [Member] | GEN Cerritos LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
Gen Cerritos II [Member] | GEN Cerritos II LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Torrance [Member] | GEN Torrance LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Rancho Cucamonga [Member] | GEN Rancho Cucamonga LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN San Jose [Member] | GEN San Jose LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Northridge [Member] | GEN Northridge LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Chino Hills [Member] | GEN Chino Hills LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Carrollton [Member] | GEN Carrollton LP [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Fort Lauderdale [Member] | GEN Fort Lauderdale LP [Member] | FL
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Fremont [Member] | GEN Fremont LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Concord [Member] | GEN Concord, LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Webster [Member] | GEN Webster, LP [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Westgate [Member] | GEN Westgate, LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
Gen Seattle [Member] | GEN Seattle LP [Member] | WA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Westheimer [Member] | GEN Westheimer, LLC [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Manhattan [Member] | GEN Manhattan NYU, LP [Member] | NY
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Maui [Member] | GEN Maui, LP [Member] | HI
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Mountain View [Member] | GEN Mountain View, LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Korean BBQ [Member] | GKBH Restaurant, LLC [Member] | HI
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
Investment Company [Member] | GEN Hawaii, LLC [Member] | HI
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Management of GKBH
Investment Company [Member] | GEN Texas, LLC [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Management of GEN Houston and GEN Webster
GEN Online [Member] | GEN Online, LLC [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Website sales
GEN Sacramento [Member] | GEN Sacramento, LP [Member] | CA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Pearlridge [Member] | GEN Pearlridge, LLC [Member] | HI
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Kapolei [Member] | GEN Kapolei, LP [Member] | HI
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Frisco [Member] | GEN Frisco, LP [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Houston [Member] | GEN Houston, LLC [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
Holding Company [Member] | GEN Master, LLC [Member] | NV
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Management
GEN Grills [Member] | GEN Grills, LP [Member] | DE
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Hibachi Concept
GRM [Member] | GEN Restaurant Management, LLC [Member] | DE
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Management
GEN Jacksonville [Member] | GEN Jacksonville, L P [Member] | FL
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Dallas [Member] | GEN Dallas, LP [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Pflugerville [Member] | GEN Pflugerville, LP [Member] | TX
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant
GEN Tigard [Member] | GEN Tigard, LP [Member] | OR
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Purpose	Restaurant