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Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | $ 2,217 | $ 1,295 | $ 6,905 | $ 4,669 |
Net sales | 44,250 | 40,216 | 122,157 | 123,340 |
Segment net income (loss) | 151 | 1,386 | (917) | 4,898 |
Depreciation and amortization | 3,264 | 1,525 | 6,674 | 4,301 |
Total assets | 235,832 | 181,027 | 235,832 | 181,027 | 183,849
Subtotal [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 46,467 | 41,511 | 129,062 | 128,009 |
Eliminations [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | (2,217) | (1,295) | (6,905) | (4,669) |
Mobile communication [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 22,926 | 21,569 | 65,567 | 59,243 |
Mobile communication [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 198 | 108 | 478 | 391 |
Mobile communication [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 5,335 | 4,803 | 16,877 | 13,312 |
Mobile communication [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 7,736 | 2,533 | 11,911 | 6,226 |
Guidance and stabilization [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,169 | 2,026 | 6,867 | 4,889 |
Guidance and stabilization [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,160 | 3,700 | 7,681 | 11,583 |
Guidance and stabilization [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,247 | 1,437 | 3,217 | 5,895 |
Guidance and stabilization [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,479 | 4,040 | 9,559 | 21,801 |
Americas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 941 | 746 | 3,893 | 3,286 |
Net sales | 32,022 | 33,763 | 95,383 | 106,301 |
Segment net income (loss) | (1,308) | 1,687 | (1,869) | 5,302 |
Depreciation and amortization | 1,143 | 1,117 | 3,403 | 3,391 |
Total assets | 116,591 | 132,415 | 116,591 | 132,415 |
Americas [Member] | Subtotal [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 32,963 | 34,509 | 99,276 | 109,587 |
Americas [Member] | Eliminations [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | (941) | (746) | (3,893) | (3,286) |
Americas [Member] | Mobile communication [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 22,528 | 21,270 | 64,434 | 58,767 |
Americas [Member] | Mobile communication [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 180 | 108 | 427 | 391 |
Americas [Member] | Mobile communication [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 79 | 181 | 292 | 409 |
Americas [Member] | Mobile communication [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,180 | 1,001 | 2,906 | 2,566 |
Americas [Member] | Guidance and stabilization [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,169 | 2,026 | 6,867 | 4,889 |
Americas [Member] | Guidance and stabilization [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,160 | 3,700 | 7,681 | 11,583 |
Americas [Member] | Guidance and stabilization [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,247 | 1,437 | 3,217 | 5,895 |
Americas [Member] | Guidance and stabilization [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,479 | 4,040 | 9,559 | 21,801 |
Europe and Asia [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,276 | 549 | 3,012 | 1,383 |
Net sales | 12,228 | 6,453 | 26,774 | 17,039 |
Segment net income (loss) | 1,459 | (301) | 952 | (404) |
Depreciation and amortization | 2,121 | 408 | 3,271 | 910 |
Total assets | 119,241 | 48,612 | 119,241 | 48,612 |
Europe and Asia [Member] | Subtotal [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 13,504 | 7,002 | 29,786 | 18,422 |
Europe and Asia [Member] | Eliminations [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | (1,276) | (549) | (3,012) | (1,383) |
Europe and Asia [Member] | Mobile communication [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 398 | 299 | 1,133 | 476 |
Europe and Asia [Member] | Mobile communication [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 18 | 0 | 51 | 0 |
Europe and Asia [Member] | Mobile communication [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 5,256 | 4,622 | 16,585 | 12,903 |
Europe and Asia [Member] | Mobile communication [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 6,556 | 1,532 | 9,005 | 3,660 |
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 |

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