| Segment information | 
Segment information for the three and  six months ended September 30, 2018, and 2017, is set forth below: 
 
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   | 
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Three months ended September 30, 2018  | 
   | 
 
(in thousands)  | 
   | 
IBW  | 
   | 
ISM  | 
   | 
CNS  | 
   | 
Total  | 
   | 
 
Revenue  | 
   | 
$  | 
3,646  | 
 
  | 
   | 
$  | 
2,646  | 
 
  | 
   | 
$  | 
3,814  | 
 
  | 
   | 
$  | 
10,106  | 
 
  | 
   | 
 
Cost of revenue  | 
   | 
1,954  | 
 
  | 
 
  | 
1,224  | 
 
  | 
   | 
2,735  | 
 
  | 
   | 
5,913  | 
 
  | 
   | 
 
Gross profit  | 
   | 
1,692  | 
 
  | 
   | 
1,422  | 
 
  | 
   | 
1,079  | 
 
  | 
   | 
4,193  | 
 
  | 
   | 
 
Gross margin  | 
   | 
46.4  | 
%  | 
   | 
53.7  | 
%  | 
   | 
28.3  | 
%  | 
   | 
41.5  | 
%  | 
   | 
 
Research and development  | 
   | 
867  | 
 
  | 
   | 
558  | 
 
  | 
   | 
418  | 
 
  | 
   | 
1,843  | 
 
  | 
   | 
 
Segment profit  | 
   | 
$  | 
825  | 
 
  | 
   | 
$  | 
864  | 
 
  | 
   | 
$  | 
661  | 
 
  | 
   | 
2,350  | 
 
  | 
   | 
 
Operating expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Sales and marketing  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
1,876  | 
 
  | 
   | 
 
General and administrative  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
1,400  | 
 
  | 
   | 
 
Intangible amortization  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
832  | 
 
  | 
   | 
 
Operating profit (loss)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
(1,758  | 
)  | 
   | 
 
Other income, net  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
165  | 
 
  | 
   | 
 
Income tax benefit (expense)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
(10  | 
)  | 
   | 
 
Net income (loss) from continuing operations  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
$  | 
(1,603  | 
)  | 
   | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
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   | 
   | 
Three months ended September 30, 2017  | 
   | 
 
(in thousands)  | 
   | 
IBW  | 
   | 
ISM  | 
   | 
CNS  | 
   | 
Total  | 
   | 
 
Revenue  | 
   | 
$  | 
7,919  | 
 
  | 
   | 
$  | 
4,730  | 
 
  | 
   | 
$  | 
4,583  | 
 
  | 
   | 
$  | 
17,232  | 
 
  | 
   | 
 
Cost of revenue  | 
   | 
4,269  | 
 
  | 
   | 
2,511  | 
 
  | 
   | 
3,177  | 
 
  | 
   | 
9,957  | 
 
  | 
   | 
 
Gross profit  | 
   | 
3,650  | 
 
  | 
   | 
2,219  | 
 
  | 
   | 
1,406  | 
 
  | 
   | 
7,275  | 
 
  | 
   | 
 
Gross margin  | 
   | 
46.1  | 
%  | 
   | 
46.9  | 
%  | 
   | 
30.7  | 
%  | 
   | 
42.2  | 
%  | 
   | 
 
Research and development  | 
   | 
1,443  | 
 
  | 
   | 
523  | 
 
  | 
   | 
239  | 
 
  | 
   | 
2,205  | 
 
  | 
   | 
 
Segment profit  | 
   | 
$  | 
2,207  | 
 
  | 
   | 
$  | 
1,696  | 
 
  | 
   | 
$  | 
1,167  | 
 
  | 
   | 
5,070  | 
 
  | 
   | 
 
Operating expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Sales and marketing  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
1,992  | 
 
  | 
   | 
 
General and administrative  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
1,809  | 
 
  | 
   | 
 
Intangible amortization  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
1,048  | 
 
  | 
   | 
 
Restructuring  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
165  | 
 
  | 
   | 
 
Operating profit (loss)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
56  | 
 
  | 
   | 
 
Other income, net  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
677  | 
 
  | 
(1)   | 
 
Income tax benefit (expense)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
(13  | 
)  | 
   | 
 
Net income (loss) from continuing operations  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
$  | 
720  | 
 
  | 
   | 
 
(1) During the quarter ended September 30, 2017, the Company dissolved the NoranTel legal entity, which triggered a one-time foreign currency gain with the reversal of a cumulative translation adjustment. See Note 1.  
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   | 
   | 
Six months ended September 30, 2018  | 
   | 
 
(in thousands)  | 
   | 
IBW  | 
   | 
ISM  | 
   | 
CNS  | 
   | 
Total  | 
   | 
 
Revenue  | 
   | 
$  | 
7,203  | 
 
  | 
   | 
$  | 
8,390  | 
 
  | 
   | 
$  | 
7,550  | 
 
  | 
   | 
$  | 
23,143  | 
 
  | 
   | 
 
Cost of revenue  | 
   | 
3,849  | 
 
  | 
 
  | 
4,020  | 
 
  | 
   | 
5,146  | 
 
  | 
   | 
13,015  | 
 
  | 
   | 
 
Gross profit  | 
   | 
3,354  | 
 
  | 
   | 
4,370  | 
 
  | 
   | 
2,404  | 
 
  | 
   | 
10,128  | 
 
  | 
   | 
 
Gross margin  | 
   | 
46.6  | 
%  | 
   | 
52.1  | 
%  | 
   | 
31.8  | 
%  | 
   | 
43.8  | 
%  | 
   | 
 
Research and development  | 
   | 
1,389  | 
 
  | 
   | 
1,127  | 
 
  | 
   | 
759  | 
 
  | 
   | 
3,275  | 
 
  | 
   | 
 
Segment profit  | 
   | 
$  | 
1,965  | 
 
  | 
   | 
$  | 
3,243  | 
 
  | 
   | 
$  | 
1,645  | 
 
  | 
   | 
6,853  | 
 
  | 
   | 
 
Operating expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Sales and marketing  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
4,013  | 
 
  | 
   | 
 
General and administrative  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
2,934  | 
 
  | 
   | 
 
Intangible amortization  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
1,822  | 
 
  | 
   | 
 
Operating profit (loss)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
(1,916  | 
)  | 
   | 
 
Other income, net  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
284  | 
 
  | 
   | 
 
Income tax benefit (expense)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
(10  | 
)  | 
   | 
 
Net income (loss) from continuing operations  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
$  | 
(1,642  | 
)  | 
   | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
   | 
   | 
Six months ended September 30, 2017  | 
   | 
 
(in thousands)  | 
   | 
IBW  | 
   | 
ISM  | 
   | 
CNS  | 
   | 
Total  | 
   | 
 
Revenue  | 
   | 
$  | 
14,875  | 
 
  | 
   | 
$  | 
8,860  | 
 
  | 
   | 
$  | 
10,071  | 
 
  | 
   | 
$  | 
33,806  | 
 
  | 
   | 
 
Cost of revenue  | 
   | 
8,211  | 
 
  | 
   | 
4,515  | 
 
  | 
   | 
7,038  | 
 
  | 
   | 
19,764  | 
 
  | 
   | 
 
Gross profit  | 
   | 
6,664  | 
 
  | 
   | 
4,345  | 
 
  | 
   | 
3,033  | 
 
  | 
   | 
14,042  | 
 
  | 
   | 
 
Gross margin  | 
   | 
44.8  | 
%  | 
 
  | 
49.0  | 
%  | 
   | 
30.1  | 
%  | 
   | 
41.5  | 
%  | 
   | 
 
Research and development  | 
   | 
2,906  | 
 
  | 
   | 
1,088  | 
 
  | 
   | 
487  | 
 
  | 
   | 
4,481  | 
 
  | 
   | 
 
Segment profit (loss)  | 
   | 
$  | 
3,758  | 
 
  | 
   | 
$  | 
3,257  | 
 
  | 
   | 
$  | 
2,546  | 
 
  | 
   | 
9,561  | 
 
  | 
   | 
 
Operating expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Sales and marketing  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
4,328  | 
 
  | 
   | 
 
General and administrative  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
3,520  | 
 
  | 
   | 
 
Intangible amortization  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
2,095  | 
 
  | 
   | 
 
Restructuring  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
165  | 
 
  | 
   | 
 
Operating profit (loss)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
(547  | 
)  | 
   | 
 
Other income, net  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
720  | 
 
  | 
(1)   | 
 
Income tax benefit (expense)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
(25  | 
)  | 
   | 
 
Net income (loss) from continuing operations  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
$  | 
148  | 
 
  | 
   | 
 
  
 
 
  
(1) During the quarter ended September 30, 2017, the Company dissolved the NoranTel legal entity, which triggered a one-time foreign currency gain with the reversal of a cumulative translation adjustment. See Note 1.   
 
 
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