Cephalon Agreement	9 Months Ended
Jan. 31, 2013
Cephalon Agreement [Abstract]
Cephalon Agreement [Text Block]	Note 9. Cephalon Agreement On March 16, 2011, the Company entered into an agreement with Cephalon, Inc., (“Cephalon”), a wholly-owned subsidiary of Teva Pharmaceutical Industries Ltd., pursuant to which the Company conducts TumorGraft studies on two proprietary chemical compounds provided by Cephalon to determine the activity or response of these compounds in potential clinical indications. Under the agreement, Cephalon will, under certain conditions, pay the Company various amounts upon achieving certain milestones, which are based on the performance of the compounds in preclinical testing and are dependent upon testing the compound in clinical settings and obtaining FDA approval. Potential milestone payments that could be received under the Agreement total $27 million per compound. No milestones have been achieved to date. In addition, under certain conditions, Cephalon would pay the Company royalties on any commercialized products developed under the Agreement. No royalties have been received or earned to date. Cephalon reserves the right to exercise and pay a one-time fee of in lieu of the milestone or royalty payments, which are $460,000 for one compound and $880,000 for the second compound. On November 30, 2012, Cephalon exercised the option to pay the one-time fee of $880,000 to the Company, in lieu of any future milestone or royalty payments, for one compound tested under the agreement described above. Written notice was provided to the Company on December 3, 2012 and payment was received on December 19, 2012. This fee has been recognized as revenue during the three and nine months ended January 31, 2013. As of January 31, 2013, the remaining compound is still being evaluated. In April 2011, Cephalon paid an initiation fee of $1.4 million to the Company, which was initially reflected within deferred revenue on the Company’s balance sheet as of April 30, 2011. As models, along with required reports, are delivered, the deferred revenue is recognized on a proportionate basis in accordance with the Company’s revenue recognition policies. Revenues of $317,000 and $681,000 were recognized during the nine months ended January 31, 2013 and 2012.

Cephalon Agreement

9 Months Ended

Jan. 31, 2013

Note 9. Cephalon Agreement

On March 16, 2011, the Company entered into an agreement with Cephalon, Inc., (“Cephalon”), a wholly-owned subsidiary of Teva Pharmaceutical Industries Ltd., pursuant to which the Company conducts TumorGraft studies on two proprietary chemical compounds provided by Cephalon to determine the activity or response of these compounds in potential clinical indications. Under the agreement, Cephalon will, under certain conditions, pay the Company various amounts upon achieving certain milestones, which are based on the performance of the compounds in preclinical testing and are dependent upon testing the compound in clinical settings and obtaining FDA approval. Potential milestone payments that could be received under the Agreement total $27 million per compound. No milestones have been achieved to date. In addition, under certain conditions, Cephalon would pay the Company royalties on any commercialized products developed under the Agreement. No royalties have been received or earned to date. Cephalon reserves the right to exercise and pay a one-time fee of in lieu of the milestone or royalty payments, which are $460,000 for one compound and $880,000 for the second compound.

On November 30, 2012, Cephalon exercised the option to pay the one-time fee of $880,000 to the Company, in lieu of any future milestone or royalty payments, for one compound tested under the agreement described above. Written notice was provided to the Company on December 3, 2012 and payment was received on December 19, 2012. This fee has been recognized as revenue during the three and nine months ended January 31, 2013. As of January 31, 2013, the remaining compound is still being evaluated.

In April 2011, Cephalon paid an initiation fee of $1.4 million to the Company, which was initially reflected within deferred revenue on the Company’s balance sheet as of April 30, 2011. As models, along with required reports, are delivered, the deferred revenue is recognized on a proportionate basis in accordance with the Company’s revenue recognition policies. Revenues of $317,000 and $681,000 were recognized during the nine months ended January 31, 2013 and 2012.