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Segment Reporting and Geographic Information - Summary of Segmented Data (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Revenue from external customers |  | $ 8,659 | $ 16,548
Intersegment revenues |  |  |
Segment gross profit |  | 3,525 | 6,167
Depreciation and amortization |  | 143 | 297
Segment income (loss) before income taxes |  | (1,128) | (1,528)
Segment assets |  | 2,552 | 18,206
Expenditures for segment assets |  | 33 | 132
PG [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from external customers |  | 2,903 | 2,513
Intersegment revenues |  |  |
Segment gross profit |  | 1,516 | 1,472
Depreciation and amortization |  | 65 | 70
Segment income (loss) before income taxes |  | (848) | (1,437)
Segment assets |  | 1,673 | 1,691
Expenditures for segment assets |  |  |
CP [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from external customers |  | 682 | 534
Intersegment revenues |  |  |
Segment gross profit |  | 378 | 319
Depreciation and amortization |  | 15 | 15
Segment income (loss) before income taxes |  | (352) | (116)
Segment assets |  | 879 | 298
Expenditures for segment assets |  |  |
Energy & Security Sonar Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from external customers | [1] | 4,620 | 12,093
Intersegment revenues | [1] |  |
Segment gross profit | [1] | 1,517 | 3,834
Depreciation and amortization | [1] | 53 | 185
Segment income (loss) before income taxes | [1] | 82 | (195)
Segment assets | [1] |  | 15,777
Expenditures for segment assets | [1] | 30 | 114
Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue from external customers | [1] | 454 | 1,408
Intersegment revenues | [1] |  |
Segment gross profit | [1] | 114 | 542
Depreciation and amortization | [1] | 10 | 27
Segment income (loss) before income taxes | [1] | (10) | 220
Segment assets | [1] |  | 440
Expenditures for segment assets | [1] | $ 3 | $ 18
[1] | Results for the year ended December 31, 2016, only include DSIT's results for the period January 1, 2016 to April 21, 2016. See Note 3.

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