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Business Segment Information - Operating Results by Business Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2016 | Apr. 30, 2015
Segment Reporting Information [Line Items] |  |
Net revenue | $ 11,182 | $ 8,863
Sales and marketing costs | (3,445) | (4,283)
Stock compensation expense | (2,599) | (3,162)
Consolidated [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 11,182 | 8,863
Direct cost of services | (8,628) | (7,588)
Sales and marketing costs | (3,247) | (3,722)
Other operating expenses | (7,024) | (7,629)
Stock compensation expense | (2,599) | (3,162)
Segment profit (loss) | (10,316) | (13,238)
Operating Segments [Member] | Personalized Oncology Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 1,972 | 1,663
Direct cost of services | (2,075) | (2,711)
Sales and marketing costs | (833) | (1,514)
Other operating expenses | 0 | 0
Stock compensation expense | 0 | 0
Segment profit (loss) | (936) | (2,562)
Operating Segments [Member] | Translational Oncology Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 9,210 | 7,200
Direct cost of services | (6,553) | (4,877)
Sales and marketing costs | (2,414) | (2,208)
Other operating expenses | (3,886) | (4,493)
Stock compensation expense | 0 | 0
Segment profit (loss) | (3,643) | (4,378)
Unallocated Corporate Overhead [Member] |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 0 | 0
Direct cost of services | 0 | 0
Sales and marketing costs | 0 | 0
Other operating expenses | (3,138) | (3,136)
Stock compensation expense | (2,599) | (3,162)
Segment profit (loss) | $ (5,737) | $ (6,298)

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