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Inventories (Tables)
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Summary of Inventories
 
 
December 31
 
 
2019
 
2020
 
 
NT$
 
NT$
 
US$ (Note 4)
       
Finished goods $7,174,716  $8,788,460  $312,979 
Work in process  2,952,182   6,816,602   242,757 
Raw materials  20,996,346   29,428,008   1,048,006 
Supplies  2,229,576   2,691,779   95,861 
Raw materials and supplies in transit  530,930   791,610   28,191 
             
  $33,883,750  $48,516,459  $1,727,794