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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2016 | Jan. 31, 2015 | Jan. 31, 2016 | Jan. 31, 2015 | Apr. 30, 2015 | Apr. 30, 2014
Operating revenue: |  |  |  |  |  |
Personalized oncology solutions | $ 416 | $ 453 | $ 1,387 | $ 1,245 | $ 1,663 | $ 2,264
Translational oncology solutions | 2,136 | 1,376 | 6,958 | 4,377 | 7,200 | 9,286
Total operating revenue | 2,552 | 1,829 | 8,345 | 5,622 | 8,863 | 11,550
Costs and operating expenses: |  |  |  |  |  |
Cost of personalized oncology solutions | 479 | 674 | 1,661 | 2,190 | 2,733 | 2,731
Cost of translational oncology solutions | 1,627 | 1,301 | 4,683 | 3,225 | 4,900 | 3,532
Research and development | 999 | 1,093 | 3,018 | 3,757 | 4,845 | 2,265
Sales and marketing | 779 | 1,094 | 2,688 | 3,340 | 4,283 | 3,155
General and administrative | 1,041 | 1,086 | 4,062 | 3,944 | 5,340 | 6,127
Total costs and operating expenses | 4,925 | 5,248 | 16,112 | 16,456 | 22,101 | 17,810
Loss from operations | (2,373) | (3,419) | (7,767) | (10,834) | (13,238) | (6,260)
Other (expense) income: |  |  |  |  |  |
Change in fair value of warrant liability | 0 | 621 | 0 | 1,401 | 981 | (965)
Warrant modification charge |  |  |  |  | (586) | 0
Other (expense) | (8) | (6) | (29) | (3) | (170) | (164)
Total other (expense) income | (8) | 615 | (29) | 1,398 | 225 | (1,129)
Loss before provision for income taxes | (2,381) | (2,804) | (7,796) | (9,436) | (13,013) | (7,389)
Provision for income taxes | 31 | 12 | 76 | 27 | 127 | 17
Net loss | $ (2,412) | $ (2,816) | $ (7,872) | $ (9,463) | $ (13,140) | $ (7,406)
Net loss per common share outstanding |  |  |  |  |  |
basic (in dollars per share) | $ (0.28) | $ (0.51) | $ (0.90) | $ (1.70) | $ (2.20) | $ (1.33)
diluted (in dollars per share) | $ (0.28) | $ (0.61) | $ (0.90) | $ (1.94) | $ (2.20) | $ (1.33)
Weighted average common shares outstanding |  |  |  |  |  |
basic (in shares) | 8,702,237 | 5,574,447 | 8,702,237 | 5,574,244 | 5,985,346 | 5,571,993
diluted (in shares) | 8,702,237 | 5,603,798 | 8,702,237 | 5,603,595 | 6,424,410 | 5,571,993
Weighted average common shares outstanding basic and diluted (in shares) |  |  |  |  | 5,985,346 | 5,571,993

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