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Segment Reporting - Summary of Segmented Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Revenue from external customers	$ 4,807	$ 4,723	$ 9,425	$ 9,177
Intersegment revenues
Segment gross profit	$ 1,665	$ 1,276	$ 3,184	$ 2,706
Depreciation and amortization	$ 129	168	$ 260	335
Restructuring and related charges		$ 198		$ 198
Impairments	$ 850		$ 850
Segment net income (loss) before income taxes	(1,992)	$ (1,862)	(2,784)	$ (3,467)
Energy & Security Sonar Solutions [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	$ 3,088	$ 2,522	$ 5,748	$ 5,037
Intersegment revenues
Segment gross profit	$ 1,185	$ 459	$ 1,790	$ 1,145
Depreciation and amortization	$ 45	$ 74	$ 90	$ 145
Restructuring and related charges
Impairments
Segment net income (loss) before income taxes	$ 90	$ (570)	$ (204)	$ (778)
Smart Grid Distribution Automation [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	$ 702	$ 1,246	$ 1,610	$ 2,209
Intersegment revenues
Segment gross profit	$ 40	$ 366	$ 317	$ 551
Depreciation and amortization	56	66	113	131
Restructuring and related charges		102		102
Impairments	850		850
Segment net income (loss) before income taxes	(1,568)	(805)	(1,893)	(1,778)
M2M [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	$ 560	$ 548	$ 1,113	$ 1,056
Intersegment revenues
Segment gross profit	$ 294	$ 252	$ 634	$ 564
Depreciation and amortization	$ 17	18	$ 35	35
Restructuring and related charges		77		77
Impairments
Segment net income (loss) before income taxes	$ (422)	(448)	$ (700)	(851)
Other [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	$ 457	$ 407	$ 954	$ 875
Intersegment revenues
Segment gross profit	$ 190	$ 199	$ 487	$ 446
Depreciation and amortization	$ 11	10	$ 22	24
Restructuring and related charges		19		19
Impairments
Segment net income (loss) before income taxes	$ (92)	$ (39)	$ 13	$ (60)

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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