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Commitments and Contingencies (Details Textual) (USD $)	9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Corporate Headquarters [Member]
Lease Expiration Date	Nov. 30, 2016
Operating Leases, Rent Expense	$ 53,000	$ 52,000
Laboratories and Office Space [Member]
Lease Expiration Date	Jun. 30, 2014
Operating Leases, Rent Expense	64,000	69,000
Israel Office Headquarters [Member]
Lease Expiration Date	Jul. 31, 2013
Operating Leases, Rent Expense	6,000	21,000
Singapore Office Headquarters in Singapore [Member]
Lease Expiration Date	Jan. 31, 2015
Operating Leases, Rent Expense	$ 4,000	$ 1,000

X

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration