Allowance for doubtful trade accounts receivables

12 Months Ended

Mar. 31, 2015

Receivables [Abstract]

Loans Notes Trade And Other Receivables Disclosure [Text Block]

23. Allowance for doubtful trade accounts receivables

	Balance at						Effect of		Balance at
	Beginning  of		Expense /		Bad debts		exchange rate		end
Description	year		(Reversal)		written off		changes		of year
	US$		US$		US$		US$		US$
Fiscal 2015		618,054		41,509		(11,172)		(22,474)		625,917
Fiscal 2014		876,300		190,493		(420,018)		(28,721)		618,054
Fiscal 2013		3,200,434		(48,580)		(2,106,011)		(169,543)		876,300