Ageing of accounts receivable which are past due but not impaired is as follows:
| December 31, 2016 |
December 31, 2017 |
December 31, 2017 |
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| NT$000 | NT$000 | US$000 | ||||||||||
|
£ 1 month |
24,141 | 10,482 | 354 | |||||||||
|
1 – 2 months |
728 | 477 | 16 | |||||||||
|
2 – 3 months |
183 | 426 | 14 | |||||||||
|
3 – 4 months |
245 | 1,431 | 48 | |||||||||
|
> 4 months |
2,013 | 3,056 | 103 | |||||||||
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| 27,310 | 15,872 | 535 | ||||||||||
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