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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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Segment Reporting (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of operations by geographic segment
Subtotal	$ 2,335	$ 2,217	$ 7,856	$ 6,905
Net sales	44,455	44,250	130,615	122,157
Segment net income (loss)	(463)	151	(1,848)	(917)
Depreciation and amortization	3,195	3,264	9,427	6,674
Total assets	231,092	235,832	231,092	235,832	$ 235,837
Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	46,790	46,467	138,471	129,062
Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(2,335)	(2,217)	(7,856)	(6,905)
Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	23,116	22,926	68,296	65,567
Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	355	198	1,345	478
Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	5,050	5,335	16,552	16,877
Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	9,068	7,736	25,678	11,911
Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,425	2,169	5,496	6,867
Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	2,424	2,160	6,216	7,681
Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	1,200	1,247	3,592	3,217
Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	817	2,479	3,440	9,559
Americas [Member]
Schedule of operations by geographic segment
Subtotal	1,198	941	4,874	3,893
Net sales	31,667	32,022	91,555	95,383
Segment net income (loss)	(728)	(1,308)	(1,805)	(1,869)
Depreciation and amortization	1,211	1,143	3,552	3,403
Total assets	143,297	116,591	143,297	116,591
Americas [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	32,865	32,963	96,429	99,276
Americas [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(1,198)	(941)	(4,874)	(3,893)
Americas [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	22,755	22,528	67,076	64,434
Americas [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	326	180	1,282	427
Americas [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	113	79	432	292
Americas [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	1,607	1,180	4,021	2,906
Americas [Member] \| Guidance and stabilization [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	2,425	2,169	5,496	6,867
Americas [Member] \| Guidance and stabilization [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	2,424	2,160	6,216	7,681
Americas [Member] \| Guidance and stabilization [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	1,200	1,247	3,592	3,217
Americas [Member] \| Guidance and stabilization [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	817	2,479	3,440	9,559
Europe and Asia [Member]
Schedule of operations by geographic segment
Subtotal	1,137	1,276	2,982	3,012
Net sales	12,788	12,228	39,060	26,774
Segment net income (loss)	265	1,459	(43)	952
Depreciation and amortization	1,984	2,121	5,875	3,271
Total assets	87,795	119,241	87,795	119,241
Europe and Asia [Member] \| Subtotal [Member]
Schedule of operations by geographic segment
Subtotal	13,925	13,504	42,042	29,786
Europe and Asia [Member] \| Eliminations [Member]
Schedule of operations by geographic segment
Subtotal	(1,137)	(1,276)	(2,982)	(3,012)
Europe and Asia [Member] \| Mobile communication [Member] \| United States [Member]
Schedule of operations by geographic segment
Subtotal	361	398	1,220	1,133
Europe and Asia [Member] \| Mobile communication [Member] \| Canada [Member]
Schedule of operations by geographic segment
Subtotal	29	18	63	51
Europe and Asia [Member] \| Mobile communication [Member] \| Europe [Member]
Schedule of operations by geographic segment
Subtotal	4,937	5,256	16,120	16,585
Europe and Asia [Member] \| Mobile communication [Member] \| Other geographic areas [Member]
Schedule of operations by geographic segment
Subtotal	7,461	6,556	21,657	9,005
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