Cephalon Agreement	6 Months Ended
Oct. 31, 2011
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 will conduct Tumorgraft studies on proprietary chemical compounds provided by Cephalon to determine the activity or response of a compound in potential clinical indications. In April 2011, Cephalon paid an initiation fee of $1.4 million to the Company which is reflected within deferred revenue on the Consolidated Balance Sheet as of April 30, 2011. The Company anticipates that the studies will be completed within 12 months of the execution of the agreement. As models, along with required reports, are delivered, the deferred revenue will be recognized on a proportionate basis in accordance with the Company’s revenue recognition policies. Based on the completion of models in the second quarter of fiscal year 2012, revenue of $237,000 was recognized during the three and six months ended October 31, 2011. No milestones have been achieved to date or payments received from Cephalon. Additionally, no royalties have been received to date. Cephalon will, under certain conditions, also pay the Company various amounts upon achieving certain milestones. Potential milestone payments to be received under the Agreement total $27 million. No milestones have been achieved to date. In addition, under certain conditions, Cephalon will pay the Company royalties on any commercialized products developed under the Agreement. No royalties have been achieved to date.

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 will conduct Tumorgraft studies on proprietary chemical compounds provided by Cephalon to determine the activity or response of a compound in potential clinical indications. In April 2011, Cephalon paid an initiation fee of $1.4 million to the Company which is reflected within deferred revenue on the Consolidated Balance Sheet as of April 30, 2011. The Company anticipates that the studies will be completed within 12 months of the execution of the agreement. As models, along with required reports, are delivered, the deferred revenue will be recognized on a proportionate basis in accordance with the Company’s revenue recognition policies. Based on the completion of models in the second quarter of fiscal year 2012, revenue of $237,000 was recognized during the three and six months ended October 31, 2011. No milestones have been achieved to date or payments received from Cephalon. Additionally, no royalties have been received to date. Cephalon will, under certain conditions, also pay the Company various amounts upon achieving certain milestones. Potential milestone payments to be received under the Agreement total $27 million. No milestones have been achieved to date. In addition, under certain conditions, Cephalon will pay the Company royalties on any commercialized products developed under the Agreement. No royalties have been achieved to date.