Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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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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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
Segment Reporting (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Schedule of operations by geographic segment
Subtotal	$ 2,423	$ 1,966
Net sales	40,380	41,305
Segment net income (loss)	(2,791)	(1,422)
Depreciation and amortization	3,189	3,129
Total assets	218,021	225,121	$ 226,277
Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	42,803	43,271
Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(2,423)	(1,966)
Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	21,244	22,481
Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	537	271
Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	8,282	5,137
Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	4,393	8,354
Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,246	1,085
Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	1,776	2,210
Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	869	847
Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	1,033	920
Americas [Member]
Schedule of operations by geographic segment
Subtotal	1,770	1,168
Net sales	28,061	28,795
Segment net income (loss)	(2,507)	(1,154)
Depreciation and amortization	1,226	1,176
Total assets	135,346	142,814
Americas [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	29,831	29,963
Americas [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(1,770)	(1,168)
Americas [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	20,717	22,046
Americas [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	347	255
Americas [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	198	98
Americas [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	875	1,334
Americas [Member] \| Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,246	1,085
Americas [Member] \| Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	1,776	2,210
Americas [Member] \| Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	869	847
Americas [Member] \| Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	1,033	920
Europe and Asia [Member]
Schedule of operations by geographic segment
Subtotal	653	798
Net sales	12,319	12,510
Segment net income (loss)	(284)	(268)
Depreciation and amortization	1,963	1,953
Total assets	82,675	82,307
Europe and Asia [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	12,972	13,308
Europe and Asia [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(653)	(798)
Europe and Asia [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	527	435
Europe and Asia [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	190	16
Europe and Asia [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	8,084	5,039
Europe and Asia [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	3,518	7,020
Europe and Asia [Member] \| Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	0	0
Europe and Asia [Member] \| Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	0	0
Europe and Asia [Member] \| Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	0	0
Europe and Asia [Member] \| Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	$ 0	$ 0