Warranty Provision (Tables)

12 Months Ended

Mar. 31, 2013

Product Warranties Disclosures [Abstract]

Summary of Warranty Activity

The Company’s warranty activity during the fiscal years ended March 31, 2013, 2012 and 2011 is summarized below:

	Fiscal years ended
	March 31, 2013			March 31, 2012			March 31, 2011
	US$			US$			US$
Balance at beginning of fiscal year		729,528			296,410			180,151
Additional provision		—			473,551			192,408
Reversal of unutilized amounts		(325,901	)		(40,433	)		(76,149	)
Balance at end of fiscal year		403,627			729,528			296,410