Commitments and Contingencies (Details Textual) (USD $)	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Corporate Headquarters [Member]
Commitments and Contingencies [Line Items]
Lease Expiration Date	Nov. 30, 2016
Operating Leases, Rent Expense	$ 42,000	$ 34,000
Laboratories and Office Space [Member]
Commitments and Contingencies [Line Items]
Lease Expiration Date	Jun. 30, 2016
Operating Leases, Rent Expense	43,000	43,000
Israel Office Headquarters [Member]
Commitments and Contingencies [Line Items]
Lease Expiration Date	Jul. 31, 2013
Operating Leases, Rent Expense	0	6,000
Singapore Office Headquarters in Singapore [Member]
Commitments and Contingencies [Line Items]
Lease Expiration Date	Jan. 31, 2015
Operating Leases, Rent Expense	2,500	3,000
New York Laboratory [Member]
Commitments and Contingencies [Line Items]
Lease Expiration Date	Sep. 30, 2015
Operating Leases, Rent Expense	$ 23,000