XML 169 R139.htm IDEA: XBRL DOCUMENT v3.20.1
Bonds Payable - Additional Information (Detail)
$ / shares in Units, $ / shares in Units, $ in Thousands, $ in Thousands
 1 Months Ended 12 Months Ended
Dec. 31, 2017
TWD ($)
Aug. 31, 2017
TWD ($)
$ / shares
Dec. 31, 2019
TWD ($)
$ / shares
Dec. 31, 2019
TWD ($)
$ / shares
Dec. 31, 2019
USD ($)
Dec. 31, 2018
TWD ($)
Disclosure of detailed information about borrowings [line items]            
Bonds payable     $ 36,522,155 $ 36,522,155 $ 1,221,068 $ 16,985,936
Unsecured Domestic Convertible Bonds [Member]            
Disclosure of detailed information about borrowings [line items]            
Bonds face amount   $ 100,000        
Bonds maturity period   3 years        
Unsecured domestic bonds conversion price | $ / shares   $ 3        
Annual interest rates of bonds   3.50%        
Secured Domestic Convertible Bonds [Member]            
Disclosure of detailed information about borrowings [line items]            
Bonds face amount $ 250,000          
Bonds maturity period 3 years          
Secured domestic bonds conversion price | (per share)     $ 4.8 $ 0.2    
Bonds redemption description (1) if the closing price of AMPI's ordinary shares on the Taipei Exchange exceeds the conversion price by 30% or more for 30 consecutive business days after 3 months from the offering date and prior to 40 days before the maturity or (2) the outstanding amount of the bonds falls below 10% of the originally offered after 3 months from the offering date and prior to 40 days before the maturity.          
Senior Unsecured International Corporate Bonds [Member]            
Disclosure of detailed information about borrowings [line items]            
Bonds face amount         1,000  
Bonds payable         300,000  
Senior Unsecured International Corporate Bonds [Member] | Tranche A [Member]            
Disclosure of detailed information about borrowings [line items]            
Bonds payable         $ 200,000  
Borrowings maturity     3 years 3 years    
Annual interest rates of bonds     2.15% 2.15% 2.15%  
Senior Unsecured International Corporate Bonds [Member] | Tranche B [Member]            
Disclosure of detailed information about borrowings [line items]            
Bonds payable         $ 100,000  
Borrowings maturity     5 years 5 years    
Annual interest rates of bonds     2.50% 2.50% 2.50%