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Bonds Payable (Tables) | 12 Months Ended
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Dec. 31, 2019
Text block [abstract] |
Summary of Bonds Payable |
|  | December 31
|  | 2018 |  | 2019
|  | NT$ |  | NT$ |  | US$ (Note 4)
Unsecured domestic bonds |  |  |  |  |  |  |  |  |  |  |  |
Repayable at maturity in January 2021 and interest due annually with annual interest rate at 1.30% |  | $ | 7,000,000 |  |  | $ | 7,000,000 |  |  | $ | 234,035 |
Repayable at maturity in January 2023 and interest due annually with annual interest rate at 1.50% |  |  | 2,000,000 |  |  |  | 2,000,000 |  |  |  | 66,867 |
Repayable at maturity in January 2022 and interest due annually with annual interest rate at 1.25% |  |  | 3,700,000 |  |  |  | 3,700,000 |  |  |  | 123,704 |
Repayable at maturity in January 2024 and interest due annually with annual interest rate at 1.45% |  |  | 4,300,000 |  |  |  | 4,300,000 |  |  |  | 143,765 |
Repayable at maturity in April 2024 and interest due annually with annual interest rate at 0.90% |  |  | — |  |  |  | 6,500,000 |  |  |  | 217,319 |
Repayable at maturity in April 2026 and interest due annually with annual interest rate at 1.03% |  |  | — |  |  |  | 3,500,000 |  |  |  | 117,018 |
Unsecured international bonds |  |  |  |  |  |  |  |  |  |  |  |
US$200,000 thousand (linked to New Taiwan dollar), repayable at maturity in October 2022 and interest due quarterly with annual interest rate at 2.15% |  |  | — |  |  |  | 6,204,800 |  |  |  | 207,449 |
US$100,000 thousand (linked to New Taiwan dollar), repayable at maturity in October 2024 and interest due quarterly with annual interest rate at 2.50% |  |  | — |  |  |  | 3,102,400 |  |  |  | 103,725 |
Secured domestic bonds |  |  |  |  |  |  |  |  |  |  |  |
Repayable at maturity in December 2020 and interest due annually with nil annual interest rate |  |  | — |  |  |  | 250,000 |  |  |  | 8,358 |
|  |  | 17,000,000 |  |  |  | 36,557,200 |  |  |  | 1,222,240 |
Less: discounts on bonds payable |  |  | 14,064 |  |  |  | 35,045 |  |  |  | 1,172 |
|  |  | 16,985,936 |  |  |  | 36,522,155 |  |  |  | 1,221,068 |
Less: current portion of bonds payable |  |  | — |  |  |  | 250,000 |  |  |  | 8,358 |
|  | $ | 16,985,936 |  |  | $ | 36,272,155 |  |  | $ | 1,212,710 |

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