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Segment Reporting (Tables) | 3 Months Ended
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Mar. 31, 2015
Segment Reporting [Abstract] |
Summary of Segmented Data |
|  | Energy& Security Sonar Solutions |  |  | GridSense |  |  | M2M |  |  | Other |  |  | Total |
Three months ended March 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  | $ | 2,660 |  |  | $ | 908 |  |  | $ | 553 |  |  | $ | 497 |  |  | $ | 4,618 |
Intersegment revenues |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Segment gross profit |  |  | 605 |  |  |  | 277 |  |  |  | 340 |  |  |  | 297 |  |  |  | 1,519 |
Depreciation and amortization |  |  | 45 |  |  |  | 57 |  |  |  | 18 |  |  |  | 11 |  |  |  | 131 |
Segment net income (loss) before income taxes |  |  | (294 | ) |  |  | (325 | ) |  |  | (278 | ) |  |  | 105 |  |  |  | (792 | )
Three months ended March 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from external customers |  | $ | 2,515 |  |  | $ | 963 |  |  | $ | 508 |  |  | $ | 468 |  |  | $ | 4,454 |
Intersegment revenues |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Segment gross profit (loss) |  |  | 686 |  |  |  | 185 |  |  |  | 312 |  |  |  | 247 |  |  |  | 1,430 |
Depreciation and amortization |  |  | 71 |  |  |  | 65 |  |  |  | 17 |  |  |  | 14 |  |  |  | 167 |
Segment net loss before income taxes |  |  | (208 | ) |  |  | (973 | ) |  |  | (403 | ) |  |  | (21 | ) |  |  | (1,605 | )
Reconciliation of Segment Data to Consolidated Statement of Operations | Reconciliation of Segment Income (Loss) to Consolidated Net Loss Before Income Taxes
|  | Three months ended March 31, |
|  | 2014 |  |  | 2015 |
Total net loss before income taxes for reportable segments |  | $ | (1,584 | ) |  | $ | (897 | )
Other operational segment net income (loss) before income taxes |  |  | (21 | ) |  |  | 105 |
Total segment net loss before income taxes |  |  | (1,605 | ) |  |  | (792 | )
Unallocated cost of corporate headquarters* |  |  | (1,043 | ) |  |  | (1,033 | )
Unallocated benefit (cost) of DSIT headquarters |  |  | (26 | ) |  |  | 10 |
Consolidated loss before income taxes |  | $ | (2,674 | ) |  | $ | (1,815 | )
* Includes stock compensation expense of $310 and $208 for the three month periods ended March 31, 2014 and 2015, respectively.

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, and discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8721-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8736-108599 + Details
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