Schedule of Nonvested Performance-based Units Activity (Details) (USD $)	6 Months Ended
	Oct. 31, 2013
Common Stock Schedule Of Nonvested Performance-based Units Activity 1	$ 1,252,931
Common Stock Schedule Of Nonvested Performance-based Units Activity 2	1.09
Common Stock Schedule Of Nonvested Performance-based Units Activity 3	1,055,000
Common Stock Schedule Of Nonvested Performance-based Units Activity 4	0.89
Common Stock Schedule Of Nonvested Performance-based Units Activity 5	(285,053)
Common Stock Schedule Of Nonvested Performance-based Units Activity 6	0.98
Common Stock Schedule Of Nonvested Performance-based Units Activity 7	(9,687)
Common Stock Schedule Of Nonvested Performance-based Units Activity 8	1.08
Common Stock Schedule Of Nonvested Performance-based Units Activity 9	2,013,191
Common Stock Schedule Of Nonvested Performance-based Units Activity 10	$ 1.00