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Segment Reporting - Summary of Segmented Data (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Segment Reporting Information [Line Items]
Revenue from external customers	$ 1,915		$ 4,105	$ 6,676		$ 7,815
Intersegment revenues
Segment gross profit	782		1,669	2,413		2,911
Depreciation and amortization	32		73	103		147
Segment net income (loss) before income taxes	(503)		(424)	(701)		(891)
PG [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	596		560	1,263		1,113
Intersegment revenues
Segment gross profit	252		294	585		634
Depreciation and amortization	16		17	32		35
Segment net income (loss) before income taxes	(473)		(422)	(712)		(700)
CP [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	165		130	339		250
Intersegment revenues
Segment gross profit	105		84	197		182
Depreciation and amortization	4		4	8		8
Segment net income (loss) before income taxes	(48)		(119)	(61)		(124)
Energy & Security Sonar Solutions [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	1,038	[1]	3,088	4,620	[1]	5,748
Intersegment revenues		[1]			[1]
Segment gross profit	384	[1]	1,185	1,517	[1]	1,790
Depreciation and amortization	10	[1]	45	53	[1]	90
Segment net income (loss) before income taxes	15	[1]	90	82	[1]	(204)
Other [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	116	[1]	327	454	[1]	704
Intersegment revenues		[1]			[1]
Segment gross profit	41	[1]	106	114	[1]	305
Depreciation and amortization	2	[1]	7	10	[1]	14
Segment net income (loss) before income taxes	$ 3	[1]	$ 27	$ (10)	[1]	$ 137
[1] * Results for the six months ended June 30, 2016, only includes results for the period January 1, 2016 to April 21, 2016. Results for the three months ended June 30, 2016, only includes results for the period April 1, 2016 to April 21, 2016. See Note 3.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 225
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-Section S99
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