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ORGANIZATION AND PRINCIPAL ACTIVITIES - Summary of subsidiaries, VIE and VIE's subsidiaries (Detail)
 12 Months Ended
Dec. 31, 2025
Subsidiaries [Member] | BaiJiaHuLian HK [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Aug. 18, 2014
Place of establishment Hong Kong, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Holding company
Subsidiaries [Member] | Beijing Lexuebang [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Jan. 12, 2015
Place of establishment Beijing, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education technical services
Subsidiaries [Member] | Wuhan Yuexuebang [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition May 25, 2020
Place of establishment Wuhan, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education technical services
Subsidiaries [Member] | Beijing Yuexuebang [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Nov. 24, 2020
Place of establishment Beijing, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education technical services
Subsidiaries [Member] | Chengdu Yuexuebang Network Technology Co., Ltd. [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Oct. 20, 2023
Place of establishment Chengdu, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education technical services
Subsidiaries [Member] | Shanghai Chuxuebang Network Technology Co., Ltd [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Feb. 18, 2021
Place of establishment Shanghai, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education technical services
Subsidiaries [Member] | Wuhan Lexuebang Network Technology Co., Ltd [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Jan. 16, 2025
Place of establishment Wuhan, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education technical services
Variable Interest Entity, Primary Beneficiary [Member] | Beijing Gaotu [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Jun. 04, 2014
Place of establishment Beijing, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services
Variable Interest Entity, Primary Beneficiary [Member] | Shanghai Duwen [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition May 01, 2025
Place of establishment Shanghai, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services
Vairable Interest Entity Subsidiaries [Member] | Beijing GaoTuYunFan Technology Co., Ltd [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition May 14, 2015
Place of establishment Beijing, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services
Vairable Interest Entity Subsidiaries [Member] | Beijing GaoTuYunJi Education Technology Co., Ltd. [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Jul. 18, 2017
Place of establishment Beijing, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services
Vairable Interest Entity Subsidiaries [Member] | Zhengzhou GaoTuYunJi Education Technology Co., Ltd [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Jan. 19, 2020
Place of establishment Zhengzhou, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services
Vairable Interest Entity Subsidiaries [Member] | Chengdu GaoTuXingHui Technology Training School Co., Ltd [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Mar. 30, 2023
Place of establishment Chengdu, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services
Vairable Interest Entity Subsidiaries [Member] | Guangdong XingZhiHuo Online Training Center [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Aug. 18, 2022
Place of establishment Guangzhou, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services
Vairable Interest Entity Subsidiaries [Member] | Guangzhou GaoTu Technology Co., Ltd [Member]  
Subsidiaries And VIEs  
Later of date of establishment or acquisition Dec. 09, 2022
Place of establishment Guangzhou, China
Percentage of direct or indirect economic ownership 100.00%
Principal activities Education services