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Segment Information - Summary of Segment Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenues |  |  |
Revenue | $ 313,564 | $ 338,160 | $ 425,940
Segment operating profit/(loss) | 6,872 | (264) | 9,324
Depreciation and amortization(Included depreciation from right of use assets) | (5,402) | (5,324) | (5,018)
Depreciation from right of use assets | (621) | (507) |
Impairment of property, plant and equipment | (202) | (546) | (11)
Interest income | 320 | 506 | 482
Interest expense | (615) | (845) | (1,200)
Income tax (expense)/benefit | (4,016) | (2,057) | (3,886)
Other disclosures |  |  |
Capital expenditure | 14,604 | 5,462 | 4,508
Total assets | 338,119 | 298,911 |
Total liabilities | 103,244 | 70,476 |
North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 73,199 | 76,575 | 103,647
Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 143,647 | 172,379 | 213,424
ROW (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 96,718 | 89,206 | 108,869
Operating segments [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | 9,845 | 2,620 | 12,467
Depreciation and amortization(Included depreciation from right of use assets) | (5,284) | (5,266) | (4,998)
Depreciation from right of use assets | (550) | (485) |
Impairment of property, plant and equipment | (202) | (546) | (11)
Interest income | 319 | 505 | 770
Interest expense | (540) | (822) | (1,179)
Income tax (expense)/benefit | (3,849) | (1,691) | (2,980)
Other disclosures |  |  |
Capital expenditure | 14,604 | 5,384 | 4,498
Total assets | 327,226 | 291,576 |
Total liabilities | 89,690 | 62,752 |
Operating segments [Member] | North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | 3,087 | 1,237 | 5,234
Depreciation and amortization(Included depreciation from right of use assets) | (796) | (811) | (829)
Depreciation from right of use assets | (46) | (44) |
Impairment of property, plant and equipment | 0 | (549) | 0
Interest income | 94 | 57 | 117
Interest expense | (178) | (239) | (397)
Income tax (expense)/benefit | (791) | (561) | (1,212)
Other disclosures |  |  |
Capital expenditure | 3,763 | 552 | 1,188
Total assets | 52,436 | 49,379 |
Total liabilities | 12,647 | 14,212 |
Operating segments [Member] | Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | 11,250 | 3,042 | 9,539
Depreciation and amortization(Included depreciation from right of use assets) | (2,773) | (2,842) | (2,836)
Depreciation from right of use assets | 0 | 0 |
Impairment of property, plant and equipment | (4) | 3 | (11)
Interest income | 192 | 403 | 611
Interest expense | (105) | (481) | (748)
Income tax (expense)/benefit | (2,344) | (1,235) | (2,152)
Other disclosures |  |  |
Capital expenditure | 10,674 | 4,590 | 2,859
Total assets | 173,967 | 165,579 |
Total liabilities | 29,911 | 26,706 |
Operating segments [Member] | ROW (Segment) [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | (4,492) | (1,659) | (2,306)
Depreciation and amortization(Included depreciation from right of use assets) | (1,715) | (1,613) | (1,333)
Depreciation from right of use assets | (504) | (441) |
Impairment of property, plant and equipment | (198) | 0 | 0
Interest income | 33 | 45 | 42
Interest expense | (257) | (102) | (34)
Income tax (expense)/benefit | (714) | 105 | 384
Other disclosures |  |  |
Capital expenditure | 167 | 242 | 451
Total assets | 100,823 | 76,618 |
Total liabilities | 47,132 | 21,834 |
Corporate expense adjustments and eliminations [Member] |  |  |
Revenues |  |  |
Segment operating profit/(loss) | (2,973) | (2,884) | (3,143)
Depreciation and amortization(Included depreciation from right of use assets) | (118) | (58) | (20)
Depreciation from right of use assets | (71) | (22) |
Impairment of property, plant and equipment | 0 | 0 | 0
Interest income | 1 | 1 | (288)
Interest expense | (75) | (23) | (21)
Income tax (expense)/benefit | (167) | (366) | (906)
Other disclosures |  |  |
Capital expenditure | 0 | 78 | 10
Total assets | 10,893 | 7,335 |
Total liabilities | 13,554 | 7,724 |
External customers [Member] |  |  |
Revenues |  |  |
Revenue | 313,564 | 338,160 | 425,940
External customers [Member] | Operating segments [Member] |  |  |
Revenues |  |  |
Revenue | 313,564 | 338,160 | 425,940
External customers [Member] | Operating segments [Member] | North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 73,199 | 76,575 | 103,647
External customers [Member] | Operating segments [Member] | Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 143,647 | 172,379 | 213,424
External customers [Member] | Operating segments [Member] | ROW (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 96,718 | 89,206 | 108,869
External customers [Member] | Corporate expense adjustments and eliminations [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 0
Intersegment [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 0
Intersegment [Member] | Operating segments [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 6 | 10,776
Intersegment [Member] | Operating segments [Member] | North Asia (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 4,076
Intersegment [Member] | Operating segments [Member] | Thailand (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 6 | 392
Intersegment [Member] | Operating segments [Member] | ROW (Segment) [Member] |  |  |
Revenues |  |  |
Revenue | 0 | 0 | 6,308
Intersegment [Member] | Corporate expense adjustments and eliminations [Member] |  |  |
Revenues |  |  |
Revenue | $ 0 | $ (6) | $ (10,776)

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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SegmentsAxis=apwc_RestOfWorldSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |