XML 26 R14.htm IDEA: XBRL DOCUMENT v3.21.1
Inventories
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
6. INVENTORIES
The components of inventories are as follows:
 
    
December 31
 
    
2019
    
2020
 
    
US$
    
US$
 
Finished goods
     26,305        11,039  
Work in process
     37,342        55,988  
Raw materials
     24,792        43,135  
    
 
 
    
 
 
 
       88,439        110,162  
    
 
 
    
 
 
 
The Company wrote down US$2,095 thousand, US$9,085 thousand and US$6,883 thousand in 2018, 2019 and 2020, respectively, for obsolete or unmarketable inventory.