Cash and Cash Equivalents (Tables)

12 Months Ended

Mar. 31, 2013

Cash And Cash Equivalents [Abstract]

Schedule of Cash and Cash Equivalents

	March 31, 2013		March 31, 2012
	US$		US$
Cash on hand and at banks		24,551,490		27,680,158
Money market funds		7,833,886		12,112,575
Total cash and cash equivalents		32,385,376		39,792,733