Stockholders' Equity - Warrants to Purchase Common Shares (Detail) (Warrants [Member], US$ Warrants [Member], USD $)	6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Warrants [Member] | US$ Warrants [Member]
Class of Warrant or Right [Line Items]
Number of Warrants, Balance at beginning of period	1,176,105	2,064,710
Number of Warrants, Issued		623,605
Number of Warrants, Expired		(1,512,210)
Number of Warrants, Balance at the end of period	1,176,105	1,176,105
Number of Warrants, Exercisable at end of period	1,176,105	552,500
Weighted Average Exercise Price, Balance at beginning of period	$ 3.67	$ 6.17
Weighted Average Exercise Price, Issued		$ 2.50
Weighted Average Exercise Price, Expired		$ 6.60
Weighted Average Exercise Price, Balance at end of period	$ 3.67	$ 3.67
Weighted Average Exercise Price, Exercisable at end of period	$ 3.67	$ 5.00