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Earnings Per Share - Computation of Basic and Diluted Earnings Attributable to Common Shareholders Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Numerator:      
Net profit attributable to APWC from continuing operations $ 2,928 $ 8,720 $ 2,853
Net profit attributable to APWC $ 2,928 $ 8,720 $ 2,853
Denominator:      
Weighted-average common shares outstanding – basic and diluted 13,819,669 13,819,669 13,819,669
Earnings per share – basic and diluted      
Continuing operations $ 0.21 $ 0.63 $ 0.21
Total earnings per share – basic and diluted $ 0.21 $ 0.63 $ 0.21