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Income Taxes (Schedule of Income Tax Provision) (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Provision for income taxes      
PRC $ 103 $ 92 $ 347
Deferred tax 55 115 277
Effective tax $ 158 $ 207 $ 624