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Intangible assets (Details 1) - USD ($)
$ in Thousands
Mar. 31, 2016
Mar. 31, 2015
Other Intangible Assets Details 1    
Land use right of factory land in Shenzhen, Guangdong, PRC $ 1,599 $ 1,880
Land use right of factory land in Xinxing, Guangdong, PRC 1,652 2,239
Golf club membership 41
Total $ 3,292 $ 4,119