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Business Segment Information (Tables) | 12 Months Ended
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Apr. 30, 2016
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment | The following tables summarize, for the periods indicated, operating results by business segment (in thousands):
Year Ended April 30, 2016 | Personalized Oncology Solutions (POS) |  | Translational Oncology Solutions (TOS) |  | Unallocated Corporate Overhead |  | Consolidated
Net revenue | $ | 1,972 |  |  | $ | 9,210 |  |  | $ | — |  |  | $ | 11,182 |
Direct cost of services | (2,075 | ) |  | (6,553 | ) |  | — |  |  | (8,628 | )
Sales and marketing costs | (833 | ) |  | (2,414 | ) |  | — |  |  | (3,247 | )
Other operating expenses | — |  |  | (3,886 | ) |  | (3,138 | ) |  | (7,024 | )
Stock compensation expense (1) | — |  |  | — |  |  | (2,599 | ) |  | (2,599 | )
Segment profit (loss) | $ | (936 | ) |  | $ | (3,643 | ) |  | $ | (5,737 | ) |  | $ | (10,316 | )
Year Ended April 30, 2015 | Personalized Oncology Solutions (POS) |  | Translational Oncology Solutions (TOS) |  | Unallocated Corporate Overhead |  | Consolidated
Net revenue | $ | 1,663 |  |  | $ | 7,200 |  |  | $ | — |  |  | $ | 8,863 |
Direct cost of services | (2,711 | ) |  | (4,877 | ) |  | — |  |  | (7,588 | )
Sales and marketing costs | (1,514 | ) |  | (2,208 | ) |  | — |  |  | (3,722 | )
Other operating expenses | — |  |  | (4,493 | ) |  | (3,136 | ) |  | (7,629 | )
Stock compensation expense (1) | — |  |  | — |  |  | (3,162 | ) |  | (3,162 | )
Segment loss | $ | (2,562 | ) |  | $ | (4,378 | ) |  | $ | (6,298 | ) |  | $ | (13,238 | )
(1) Stock compensation expense is shown separately and is excluded from direct costs of services, sales and marketing costs, and other operating expenses in the table above, as it is managed on a consolidated basis and is not used by management to evaluate the performance of its segments. See Note 6 for the allocation of stock compensation expense relative to the individual line items as it is reported on the Company's Consolidated Statement of Operations.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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