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Cephalon Agreement	6 Months Ended
Oct. 31, 2012
Cephalon Agreement [Abstract]
Cephalon Agreement [Text Block]	Note 10. 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 ranges from $460,000 to $880,000 per compound. On November 30, 2012, Cephalon exercised the option to pay this one-time fee for one of the compounds, which is further discussed in Note 15. 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 $237,000 were recognized during the six months ended October 31, 2012 and 2011.

Cephalon Agreement

6 Months Ended

Oct. 31, 2012

Note 10. 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 ranges from $460,000 to $880,000 per compound. On November 30, 2012, Cephalon exercised the option to pay this one-time fee for one of the compounds, which is further discussed in Note 15.

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 $237,000 were recognized during the six months ended October 31, 2012 and 2011.