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		9 Months Ended
Segment Reporting (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Schedule of operations by geographic segment
Subtotal	$ 1,293	$ 2,335	$ 6,052	$ 7,856
Net sales	45,846	44,455	132,192	130,615
Segment net income (loss)	2,863	(463)	(734)	(1,848)
Depreciation and amortization	2,835	3,195	9,090	9,427
Total assets	213,696	231,092	213,696	231,092	$ 226,277
Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	47,139	46,790	138,244	138,471
Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(1,293)	(2,335)	(6,052)	(7,856)
Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	25,801	23,116	71,931	68,296
Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	241	355	1,328	1,345
Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	6,302	5,050	22,392	16,552
Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	4,110	9,068	12,956	25,678
Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,720	2,425	6,416	5,496
Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	4,768	2,424	11,391	6,216
Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	659	1,200	2,601	3,592
Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	1,245	817	3,177	3,440
Americas [Member]
Schedule of operations by geographic segment
Subtotal	539	1,198	3,885	4,874
Net sales	35,417	31,667	97,711	91,555
Segment net income (loss)	553	(728)	(3,593)	(1,805)
Depreciation and amortization	1,140	1,211	3,572	3,552
Total assets	136,175	143,297	136,175	143,297
Americas [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	35,956	32,865	101,596	96,429
Americas [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(539)	(1,198)	(3,885)	(4,874)
Americas [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	25,093	22,755	69,948	67,076
Americas [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	166	326	865	1,282
Americas [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	123	113	712	432
Americas [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	643	1,607	2,601	4,021
Americas [Member] \| Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,720	2,425	6,416	5,496
Americas [Member] \| Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	4,768	2,424	11,391	6,216
Americas [Member] \| Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	659	1,200	2,601	3,592
Americas [Member] \| Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	1,245	817	3,177	3,440
Europe and Asia [Member]
Schedule of operations by geographic segment
Subtotal	754	1,137	2,167	2,982
Net sales	10,429	12,788	34,481	39,060
Segment net income (loss)	2,310	265	2,859	(43)
Depreciation and amortization	1,695	1,984	5,518	5,875
Total assets	77,521	87,795	77,521	87,795
Europe and Asia [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	11,183	13,925	36,648	42,042
Europe and Asia [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(754)	(1,137)	(2,167)	(2,982)
Europe and Asia [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	708	361	1,983	1,220
Europe and Asia [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	75	29	463	63
Europe and Asia [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	6,179	4,937	21,680	16,120
Europe and Asia [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	3,467	7,461	10,355	21,657
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