| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
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|
Three Months Ended January 31, 2014
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|
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OEM
|
|
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Proprietary
|
|
|
Total
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total revenues
|
|
$
|
3,032
|
|
|
$
|
4,651
|
|
|
$
|
7,683
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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Gross margin
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|
$
|
698
|
|
|
$
|
2,224
|
|
|
$
|
2,922
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|
|
|
|
Three Months Ended January 31, 2013
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|
|
|
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OEM
|
|
|
Proprietary
|
|
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Total
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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Total revenues
|
|
$
|
4,424
|
|
|
$
|
3,034
|
|
|
$
|
7,458
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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Gross margin
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|
$
|
1,226
|
|
|
$
|
1,577
|
|
|
$
|
2,803
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|
|
|
|
Nine Months Ended January 31, 2014
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|
|
|
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OEM
|
|
|
Proprietary
|
|
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Total
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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Total revenues
|
|
$
|
10,930
|
|
|
$
|
10,857
|
|
|
$
|
21,787
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Gross margin
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|
$
|
2,772
|
|
|
$
|
5,386
|
|
|
$
|
8,158
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Goodwill
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|
$
|
-
|
|
|
$
|
1,942
|
|
|
$
|
1,942
|
|
|
|
|
Nine Months Ended January 31, 2013
|
|
|
|
|
OEM
|
|
|
Proprietary
|
|
|
Total
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total revenues
|
|
$
|
9,968
|
|
|
$
|
7,885
|
|
|
$
|
17,853
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Gross margin
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|
$
|
2,574
|
|
|
$
|
4,029
|
|
|
$
|
6,603
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Goodwill
|
|
$
|
-
|
|
|
$
|
1,942
|
|
|
$
|
1,942
|
|
|
| Revenue from External Customers by Products and Services [Table Text Block] |
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Three Months Ended
January 31,
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|
Nine Months Ended
January 31,
|
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|
|
|
2014
|
|
|
2013
|
|
|
2014
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|
|
2013
|
|
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Products and services:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
OEM solutions
|
|
$
|
2,984
|
|
|
$
|
4,382
|
|
|
$
|
10,757
|
|
|
$
|
9,800
|
|
|
Remote monitoring solutions
|
|
|
3,926
|
|
|
|
1,357
|
|
|
|
8,260
|
|
|
|
4,208
|
|
|
Industrial data communications
|
|
|
333
|
|
|
|
113
|
|
|
|
829
|
|
|
|
624
|
|
|
Mobile data acquisition
|
|
|
265
|
|
|
|
1,484
|
|
|
|
1,439
|
|
|
|
2,765
|
|
|
Other services:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
OEM related services
|
|
|
48
|
|
|
|
42
|
|
|
|
173
|
|
|
|
168
|
|
|
Proprietary product related services
|
|
|
127
|
|
|
|
80
|
|
|
|
329
|
|
|
|
287
|
|
|
Total sales
|
|
$
|
7,683
|
|
|
$
|
7,458
|
|
|
$
|
21,787
|
|
|
$
|
17,853
|
|
|