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Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Mar. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Value added tax receivable $ 118 $ 120
Rental and utility deposit 15 21
Advance to suppliers 123 254
Prepayment 403 728
Coupon and dividend receivable 140 58
Others 859 939
Total prepaid expenses and other current assets $ 1,658 $ 2,120