| Segment information | 
        
Segment information for the three months ended June 30, 2014, and 2013 is set forth below: 
 
 
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   | 
   | 
   | 
Three months ended June 30, 2014  | 
 
(in thousands)  | 
   | 
   | 
CSG  | 
   | 
IBW  | 
   | 
Total  | 
 
Revenue  | 
   | 
   | 
$  | 
13,728  | 
 
  | 
   | 
$  | 
14,097  | 
 
  | 
   | 
$  | 
27,825  | 
 
  | 
 
Cost of revenue  | 
   | 
   | 
9,855  | 
 
  | 
   | 
8,286  | 
 
  | 
   | 
18,141  | 
 
  | 
 
Gross profit  | 
   | 
   | 
3,873  | 
 
  | 
   | 
5,811  | 
 
  | 
   | 
9,684  | 
 
  | 
 
Gross margin  | 
   | 
   | 
28.2  | 
%  | 
   | 
41.2  | 
%  | 
   | 
34.8  | 
%  | 
 
Research and development  | 
   | 
   | 
2,280  | 
 
  | 
   | 
2,195  | 
 
  | 
   | 
4,475  | 
 
  | 
 
Segment profit  | 
   | 
   | 
$  | 
1,593  | 
 
  | 
   | 
$  | 
3,616  | 
 
  | 
   | 
5,209  | 
 
  | 
 
Operating expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Sales and marketing  | 
   | 
   | 
   | 
   | 
   | 
   | 
3,421  | 
 
  | 
 
General and administrative  | 
   | 
   | 
   | 
   | 
   | 
   | 
3,054  | 
 
  | 
 
Intangible amortization  | 
   | 
   | 
   | 
   | 
   | 
   | 
1,585  | 
 
  | 
 
Restructuring  | 
   | 
   | 
   | 
   | 
   | 
   | 
57  | 
 
  | 
 
Operating loss  | 
   | 
   | 
   | 
   | 
   | 
   | 
(2,908  | 
)  | 
 
Other income (expense)  | 
   | 
   | 
   | 
   | 
   | 
   | 
61  | 
 
  | 
 
Income tax benefit (expense)  | 
   | 
   | 
   | 
   | 
   | 
   | 
29  | 
 
  | 
 
Net loss from continuing operations  | 
   | 
   | 
   | 
   | 
   | 
   | 
$  | 
(2,818  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
   | 
   | 
   | 
Three months ended June 30, 2013  | 
 
(in thousands)  | 
   | 
   | 
CSG  | 
   | 
IBW  | 
   | 
Total  | 
 
Revenue  | 
   | 
   | 
$  | 
21,429  | 
 
  | 
   | 
$  | 
1,027  | 
 
  | 
   | 
$  | 
22,456  | 
 
  | 
 
Cost of revenue  | 
   | 
   | 
13,307  | 
 
  | 
   | 
732  | 
 
  | 
   | 
14,039  | 
 
  | 
 
Gross profit  | 
   | 
   | 
8,122  | 
 
  | 
   | 
295  | 
 
  | 
   | 
8,417  | 
 
  | 
 
Gross margin  | 
   | 
   | 
37.9  | 
%  | 
   | 
28.7  | 
%  | 
   | 
37.5  | 
%  | 
 
Research and development  | 
   | 
   | 
2,507  | 
 
  | 
   | 
192  | 
 
  | 
   | 
2,699  | 
 
  | 
 
Segment profit  | 
   | 
   | 
$  | 
5,615  | 
 
  | 
   | 
$  | 
103  | 
 
  | 
   | 
5,718  | 
 
  | 
 
Operating expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
 
  | 
 
  | 
 
Sales and marketing  | 
   | 
   | 
   | 
   | 
 
  | 
 
  | 
   | 
3,059  | 
 
  | 
 
General and administrative  | 
   | 
   | 
   | 
   | 
 
  | 
 
  | 
   | 
3,572  | 
 
  | 
 
Intangible amortization  | 
   | 
   | 
   | 
   | 
   | 
   | 
1,622  | 
 
  | 
 
Restructuring  | 
   | 
   | 
   | 
   | 
 
  | 
 
  | 
   | 
66  | 
 
  | 
 
Operating loss  | 
   | 
   | 
   | 
   | 
   | 
   | 
(2,601  | 
)  | 
 
Other income (expense)  | 
   | 
   | 
   | 
   | 
 
  | 
 
  | 
   | 
(130  | 
)  | 
 
Income tax benefit (expense)  | 
   | 
   | 
   | 
   | 
 
  | 
 
  | 
   | 
(19  | 
)  | 
 
Net loss from continuing operations  | 
   | 
   | 
   | 
   | 
   | 
   | 
$  | 
(2,750  | 
)  | 
 
  
 
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