Allowance for doubtful trade accounts receivables (Tables)

12 Months Ended

Mar. 31, 2014

Receivables [Abstract]

Allowance for Doubtful Trade Accounts Receivables [Table Text Block]

Description	Balance at Beginning of year		Expense / (Reversal)		Bad debts written off		Effect of exchange rate changes		Balance at end of year
	US$		US$		US$		US$		US$
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
Fiscal 2012		4,022,664		37,700		(423,245)		(436,685)		3,200,434