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Business Segment Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2015 | Apr. 30, 2014
Net revenue |  | $ 8,863 | $ 11,550
Sales and marketing costs |  | (4,283) | (3,155)
Stock compensation expense |  | (3,162) | (2,807)
Personalized Oncology Solutions [Member] |  |  |
Net revenue |  | 1,663 | 2,264
Direct cost of services |  | (2,711) | (2,667)
Sales and marketing costs |  | (1,514) | (1,723)
Other operating expenses |  | 0 | 0
Stock compensation expense | [1] | 0 | 0
Segment profit (loss) |  | (2,562) | (2,126)
Translational Oncology Solutions [Member] |  |  |
Net revenue |  | 7,200 | 9,286
Direct cost of services |  | (4,877) | (3,496)
Sales and marketing costs |  | (2,208) | (1,080)
Other operating expenses |  | (4,493) | (2,209)
Stock compensation expense | [1] | 0 | 0
Segment profit (loss) |  | (4,378) | 2,501
Unallocated Corporate Overhead [Member] |  |  |
Net revenue |  | 0 | 0
Direct cost of services |  | 0 | 0
Sales and marketing costs |  | 0 | 0
Other operating expenses |  | (3,136) | (3,828)
Stock compensation expense | [1] | (3,162) | (2,807)
Segment profit (loss) |  | (6,298) | (6,635)
Consolidated [Member] |  |  |
Net revenue |  | 8,863 | 11,550
Direct cost of services |  | (7,588) | (6,163)
Sales and marketing costs |  | (3,722) | (2,803)
Other operating expenses |  | (7,729) | (6,037)
Stock compensation expense | [1] | (3,162) | (2,807)
Segment profit (loss) |  | $ (13,238) | $ (6,260)
[1] | Stock compensation expense is shown separately and is excluded from direct costs of services, sales and marketing costs, and other operating expenses, as it is managed on a consolidated basis and is not used by management to evaluate the performance of its segments.

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