XML 136 R150.htm IDEA: XBRL DOCUMENT v3.20.1
Current Refund Liabilities - Summary of Movements in Refund Liabilities (Detail) - TWD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of refund liability [abstract]    
Beginning balance $ 32,627 $ 70,156
Provision 63,863 44,950
Reversal   (7,413)
Payment (70,490) (75,066)
Ending balance $ 26,000 $ 32,627