Warranty Provision (Tables)

12 Months Ended

Mar. 31, 2014

Guarantees [Abstract]

Summary of Warranty Activity

The Company’s warranty activity during the fiscal years ended March 31, 2014, 2013 and 2012 is summarized below:

	Fiscal years ended
	March 31, 2014			March 31, 2013			March 31, 2012
	US$			US$			US$
Balance at beginning of fiscal year		403,627			729,528			296,410
Additional provision		485,229			—			473,551
Reversal of unutilized amounts		(19,122	)		(325,901	)		(40,433	)
Balance at end of fiscal year		869,734			403,627			729,528