Commitments and Contingencies (Details Textual) (USD $)	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Corporate Headquarters [Member]
Lease Expiration Date	Apr. 30, 2014
Operating Leases, Rent Expense	$ 17,000	$ 17,000
Laboratories and Office Space [Member]
Lease Expiration Date	Apr. 30, 2014
Operating Leases, Rent Expense	22,000	16,000
Israel Office Headquarters [Member]
Lease Expiration Date	Jul. 31, 2013
Operating Leases, Rent Expense	5,600	7,000
Singapore Office Headquarters in Singapore [Member]
Lease Expiration Date	Jan. 31, 2014
Operating Leases, Rent Expense	$ 1,400	$ 0