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21. Share-based compensation (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Dec. 31, 2016
Equity [Abstract]      
Share-based compensation expense $ 0 $ 23  
Weighted average fair value of options granted     $ 1.12