XML 30 R40.htm IDEA: XBRL DOCUMENT v2.4.0.6

Commitments and Contingencies (Details Textual) (USD $)	6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Corporate Headquarters [Member]
Lease Expiration Date	Apr. 30, 2014
Operating Leases, Rent Expense	$ 34,000	$ 34,000
Laboratories and Office Space [Member]
Lease Expiration Date	Jun. 30, 2014
Operating Leases, Rent Expense	33,000	29,000
Office Headquarters [Member]
Lease Expiration Date	Jul. 31, 2013
Operating Leases, Rent Expense	$ 14,000	$ 13,000

X

- Definition

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

+ 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