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Segment Information (Tables)
 6 Months Ended
Oct. 31, 2016
Segment Reporting [Abstract]  
Summary of Segment Activity
The following tables summarize, for the periods indicated, operating results by reportable segment (table in thousands):
Three months ended October 31, 2016
 
Personalized
Oncology
Solutions
(POS)
 
Translational
Oncology
Solutions
(TOS)
 
Unallocated
Corporate
Overhead
 
Consolidated
Net revenue
 
$
497

 
$
3,960

 
$
—

 
$
4,457

Direct cost of services
 
(374
)
 
(1,826
)
 
—

 
(2,200
)
Sales and marketing costs
 
(128
)
 
(571
)
 
—

 
(699
)
Other operating expenses
 
—

 
(964
)
 
(552
)
 
(1,516
)
Stock- based compensation expense (1)
 
—

 
—

 
(535
)
 
(535
)
 
 
 
 
 
 
 
 
 
Segment profit (loss)
 
$
(5
)
 
$
599

 
$
(1,087
)
 
$
(493
)
 
Three months ended October 31, 2015
 
Personalized
Oncology
Solutions
(POS)
 
Translational
Oncology
Solutions
(TOS)
 
Unallocated
Corporate
Overhead
 
Consolidated
Net revenue
 
$
486

 
$
2,485

 
$
—

 
$
2,971

Direct cost of services
 
(567
)
 
(1,441
)
 
—

 
(2,008
)
Sales and marketing costs
 
(189
)
 
(620
)
 
—

 
(809
)
Other operating expenses
 
—

 
(873
)
 
(1,026
)
 
(1,899
)
Stock- based compensation expense (1)
 
—

 
—

 
(748
)
 
(748
)
 
 
 
 
 
 
 
 
 
Segment profit (loss)
 
$
(270
)
 
$
(449
)
 
$
(1,774
)
 
$
(2,493
)
 
Six Months Ended October 31, 2016
 
Personalized
Oncology
Solutions
(POS)
 
Translational
Oncology
Solutions
(TOS)
 
Unallocated
Corporate
Overhead
 
Consolidated
Net revenue
 
$
1,007

 
$
7,119

 
$
—

 
$
8,126

Direct cost of services
 
(845
)
 
(3,832
)
 
—

 
(4,677
)
Sales and marketing costs
 
(269
)
 
(1,187
)
 
—

 
(1,456
)
Other operating expenses
 
—

 
(2,090
)
 
(1,256
)
 
(3,346
)
Stock- based compensation expense (1)
 
—

 
—

 
(1,664
)
 
(1,664
)
 
 
 
 
 
 
 
 
 
Segment profit (loss)
 
$
(107
)
 
$
10

 
$
(2,920
)
 
$
(3,017
)
 
Six Months Ended October 31, 2015
 
Personalized
Oncology
Solutions
(POS)
 
Translational
Oncology
Solutions
(TOS)
 
Unallocated
Corporate
Overhead
 
Consolidated
Net revenue
 
$
971

 
$
4,822

 
$
—

 
$
5,793

Direct cost of services
 
(1,202
)
 
(3,030
)
 
—

 
(4,232
)
Sales and marketing costs
 
(521
)
 
(1,197
)
 
—

 
(1,718
)
Other operating expenses
 
—

 
(1,806
)
 
(1,904
)
 
(3,710
)
Stock- based compensation expense (1)
 
—

 
—

 
(1,523
)
 
(1,523
)
 
 
 
 
 
 
 
 
 
Segment profit (loss)
 
$
(752
)
 
$
(1,211
)
 
$
(3,427
)
 
$
(5,390
)

(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. See Note 3 for the allocation of stock compensation expense relative to the individual line items as it is reported on the Company's Consolidated Statements of Operations.