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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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		6 Months Ended
Segment Reporting (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Schedule of operations by geographic segment
Subtotal	$ 2,337	$ 3,555	$ 4,760	$ 5,521
Net sales	45,966	44,855	86,346	86,160
Segment net income (loss)	(806)	37	(3,597)	(1,385)
Depreciation and amortization	3,066	3,144	6,255	6,232
Total assets	209,172	231,449	209,172	231,449	$ 226,277
Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	48,303	48,410	91,106	91,681
Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(2,337)	(3,555)	(4,760)	(5,521)
Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	23,508	22,699	44,752	45,180
Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	551	719	1,088	990
Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	7,809	6,365	16,090	11,502
Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	4,453	8,256	8,846	16,610
Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,827	1,986	5,073	3,071
Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	4,847	1,582	6,623	3,792
Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	1,073	1,545	1,942	2,392
Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	898	1,703	1,932	2,623
Americas [Member]
Schedule of operations by geographic segment
Subtotal	1,577	2,508	3,347	3,676
Net sales	34,232	31,093	62,294	59,888
Segment net income (loss)	(1,639)	77	(4,146)	(1,077)
Depreciation and amortization	1,206	1,206	2,432	2,341
Total assets	132,547	143,007	132,547	143,007
Americas [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	35,809	33,601	65,641	63,564
Americas [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(1,577)	(2,508)	(3,347)	(3,676)
Americas [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	22,760	22,275	43,477	44,321
Americas [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	353	701	700	956
Americas [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	391	221	589	319
Americas [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	1,083	1,080	1,958	2,414
Americas [Member] \| Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,827	1,986	5,073	3,071
Americas [Member] \| Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	4,847	1,582	6,623	3,792
Americas [Member] \| Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	1,073	1,545	1,942	2,392
Americas [Member] \| Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	898	1,703	1,932	2,623
Europe and Asia [Member]
Schedule of operations by geographic segment
Subtotal	760	1,047	1,413	1,845
Net sales	11,734	13,762	24,052	26,272
Segment net income (loss)	833	(40)	549	(308)
Depreciation and amortization	1,860	1,938	3,823	3,891
Total assets	76,625	88,442	76,625	88,442
Europe and Asia [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	12,494	14,809	25,465	28,117
Europe and Asia [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(760)	(1,047)	(1,413)	(1,845)
Europe and Asia [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	748	424	1,275	859
Europe and Asia [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	198	18	388	34
Europe and Asia [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	7,418	6,144	15,501	11,183
Europe and Asia [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	3,370	7,176	6,888	14,196
Europe and Asia [Member] \| Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	0	0	0	0
Europe and Asia [Member] \| Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	0	0	0	0
Europe and Asia [Member] \| Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	0	0	0	0
Europe and Asia [Member] \| Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	$ 0	$ 0	$ 0	$ 0