Commitments and Contingencies

6 Months Ended

Oct. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

Note 7. Commitments and Contingencies

Operating Leases

As of October 31, 2011, the Company leases office and laboratory space under a non-cancelable operating lease in Baltimore, Maryland, which expires in April 2014, office space under a non-cancelable operating lease in Ra’anana, Israel, which expires in July 2012, and office space in Hackensack, New Jersey under a non-cancellable operating lease, which expires in 2014. Rent expense under all lease agreements was approximately $39,000 and $14,000 for the three months ended October 31, 2011 and 2010, respectively, and $76,000 and $27,000 for the six months ended October 31, 2011 and 2010, respectively.

Research and Development Materials Purchase Agreement

In February 2010, the Company entered into a research and development materials purchase agreement with a foreign hospital for the acquisition of Tumorgrafts. Under the agreement, the Company makes monthly payments to the foreign hospital of approximately $37,000 for 18 months, commencing March 1, 2010. Payments outstanding under the agreement total $147,000 at October 31, 2011.

Legal Matters

The Company is party to certain legal matters arising in the ordinary course of its business. The Company has evaluated its potential exposure to these legal matters, and has concluded that there were no reasonably possible or probable liabilities at October 31, 2011 and April 30, 2011. The Company is not aware of any other matters that would have a material impact on the Company’s financial position or results of operations.

Registration Payment Arrangements

The Company has entered into registration rights agreements in connection with a private placement of its securities, which closed during April 2011 and is discussed more fully in Note 5. This registration rights agreement contains provisions that may call for the Company to pay penalties in certain circumstances. This registration payment arrangement primarily relates to the Company’s ability to file a registration statement within a particular time period, have a registration statement declared effective within a particular time period and to maintain the effectiveness of the registration statement for a particular time period. The Company does not believe it is probable that penalty payments will be made for the registration rights agreement discussed above and, accordingly, has not accrued for such potential penalties as of October 31, 2011.