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Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2018
Long Term Bank Loans [member] |
Statement [LineItems] |
Summary of Borrowings |
| 1) | Bank loans
|  | December 31
|  | 2017 |  | 2018
|  | NT$ |  | NT$ |  | US$ (Note 4)
Working capital bank loans |  |  |  |  |  |
Syndicated bank loans - repayable through May 2019 to May 2023, annual interest rates were 2.61% -2.70% and 1.80% as of December 31, 2017 and 2018, respectively |  | $ | 4,761,600 |  |  | $ | 55,000,000 |  |  | $ | 1,796,798 |
Others - repayable through February 2019 to October 2023, annual interest rates were 0.93%-2.10% and 0.75%-3.77% as of December 31, 2017 and 2018, respectively |  |  | 23,941,947 |  |  |  | 75,533,354 |  |  |  | 2,467,604 |
Mortgage loans |  |  |  |  |  |  |  |  |  |  |  |
Repayable through July 2019 to June 2023, annual interest rates were 4.95%-5.39% and 5.39% as of December 31, 2017 and 2018 |  |  | 4,705,149 |  |  |  | 4,393,826 |  |  |  | 143,542 |
|  |  | 33,408,696 |  |  |  | 134,927,180 |  |  |  | 4,407,944 |
Less: unamortized arrangement fee |  |  | 1,200 |  |  |  | 128,083 |  |  |  | 4,184 |
|  |  | 33,407,496 |  |  |  | 134,799,097 |  |  |  | 4,403,760 |
Less: current portion |  |  | 8,261,625 |  |  |  | 10,779,034 |  |  |  | 352,141 |
|  | $ | 25,145,871 |  |  | $ | 124,020,063 |  |  | $ | 4,051,619 |
Longterm Bills Payable [member] |
Statement [LineItems] |
Summary of Borrowings |
| 2) | Long-term bills payable
|  | December 31
|  | 2017 |  | 2018
|  | NT$ |  | NT$ |  | US$ (Note 4)
China Bills Finance Corporation, repayable in February 2020, annual interest rate were 0.96% and 0.99% as of December 31, 2017 and 2018, respectively |  | $ | 1,000,000 |  |  | $ | 1,000,000 |  |  | $ | 32,669 |
International Bills Finance Corporation, repayable in March 2020, annual interest rate were 0.96% and %1.00% as of December 31, 2017 and 2018, respectively |  |  | 1,000,000 |  |  |  | 1,000,000 |  |  |  | 32,669 |
Ta Ching Bills Finance Corporation, repayable in January 2020, annual interest rates was 0.98% as of December 31, 2018 |  |  | - |  |  |  | 1,100,000 |  |  |  | 35,936 |
|  |  | 2,000,000 |  |  |  | 3,100,000 |  |  |  | 101,274 |
Less: unamortized discounts |  |  | 868 |  |  |  | 768 |  |  |  | 25 |
|  | $ | 1,999,132 |  |  | $ | 3,099,232 |  |  | $ | 101,249 |

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