Share-Based Payments (Details 4) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jul. 31, 2013	Apr. 30, 2013
Weighted Average Exercise Price, Ending Balance	$ 0.61	$ 0.61
Warrant [Member]
Number of Shares, Begining Balance	3,276,667
Number of Shares, Granted	0
Number of Shares, Exercised	0
Number of Shares, Expired	0
Number of Shares, Ending Balance	3,276,667	3,276,667
Weighted Average Exercise Price, Granted	$ 0
Weighted Average Exercise Price, Exercised	$ 0
Weighted Average Exercise Price, Expired	$ 0
Weighted Average Remaining Contractual Life (Years)	3 years 8 months 12 days	3 years 10 months 24 days
Weighted Average Remaining Contractual Life (Years), Granted	0 years
Weighted Average Remaining Contractual Life (Years), Exercised	0 years
Weighted Average Remaining Contractual Life (Years), Expired	0 years
Aggregate Intrinsic Value, Begining Balance	$ 0
Aggregate Intrinsic Value, Granted	0
Aggregate Intrinsic Value, Exercised	0
Aggregate Intrinsic Value, Expired	0
Aggregate Intrinsic Value, Ending Balance	$ 1,462,000	$ 0