6. NOTE PAYABLE (Narrative) (USD $)	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Debt Disclosure [Abstract]
Loss on early extinguishment of debt	$ 0	$ (1,696,000)	$ 0	$ (1,696,000)
Repayment of note payable			0	975,000
Unamortized debt issuance cost			0	251,000
Fair value of warrants			$ 0	$ 470,000