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Segment Reporting - Summary of Segmented Data (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue from external customers |  | $ 942 | $ 4,402 | $ 7,618 | $ 12,217
Intersegment revenues |  |  |  |  |
Segment gross profit |  | 524 | 1,823 | 2,937 | 4,734
Depreciation and amortization |  | 19 | 74 | 122 | 221
Segment net income (loss) before income taxes |  | (265) | (46) | (899) | (937)
PG [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue from external customers |  | 794 | 661 | 2,057 | 1,774
Intersegment revenues |  |  |  |  |
Segment gross profit |  | 438 | 401 | 1,023 | 1,035
Depreciation and amortization |  | 16 | 18 | 48 | 53
Segment net income (loss) before income taxes |  | (243) | (431) | (893) | (1,131)
CP [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue from external customers |  | 148 | 126 | 487 | 376
Intersegment revenues |  |  |  |  |
Segment gross profit |  | 86 | 34 | 283 | 216
Depreciation and amortization |  | 3 | 3 | 11 | 11
Segment net income (loss) before income taxes |  | (22) | (6) | (78) | (130)
Energy & Security Sonar Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue from external customers | [1] |  | 3,277 | 4,620 | 9,025
Intersegment revenues | [1] |  |  |  |
Segment gross profit | [1] |  | 1,258 | 1,517 | 3,048
Depreciation and amortization | [1] |  | 47 | 53 | 137
Segment net income (loss) before income taxes | [1] |  | 336 | 82 | 132
Other [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue from external customers | [1] |  | 338 | 454 | 1,042
Intersegment revenues | [1] |  |  |  |
Segment gross profit | [1] |  | 130 | 114 | 435
Depreciation and amortization | [1] |  | 6 | 10 | 20
Segment net income (loss) before income taxes | [1] |  | $ 55 | $ (10) | $ 192
[1] | Results for the nine months ended September 30, 2016, only include results for the period January 1, 2016 to April 21, 2016. See Note 3.

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