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Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Schedule of operations by geographic segment |  |  |  |  |
Intercompany sales | $ 1,295 | $ 1,798 | $ 4,669 | $ 9,479 |
Net sales | 40,216 | 38,822 | 123,340 | 97,569 |
Segment net income (loss) | 1,386 | 1,745 | 4,898 | 823 |
Depreciation and amortization | 1,525 | 1,632 | 4,301 | 3,377 |
Total assets | 181,027 | 134,101 | 181,027 | 134,101 | 137,568
Subtotal [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 41,511 | 40,620 | 128,009 | 107,048 |
Eliminations [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Intercompany sales | (1,295) | (1,798) | (4,669) | (9,479) |
Mobile communication [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 21,569 | 16,609 | 59,243 | 47,202 |
Mobile communication [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 108 | 205 | 391 | 571 |
Mobile communication [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 4,803 | 2,955 | 13,312 | 12,804 |
Mobile communication [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,533 | 2,435 | 6,226 | 6,502 |
Guidance and stabilization [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,026 | 1,720 | 4,889 | 4,848 |
Guidance and stabilization [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 3,700 | 2,718 | 11,583 | 7,925 |
Guidance and stabilization [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,437 | 3,407 | 5,895 | 7,758 |
Guidance and stabilization [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 4,040 | 8,773 | 21,801 | 9,959 |
Americas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Intercompany sales | 746 | 1,577 | 3,286 | 8,208 |
Net sales | 33,763 | 34,801 | 106,301 | 81,382 |
Segment net income (loss) | 1,687 | 1,996 | 5,302 | 1,621 |
Depreciation and amortization | 1,117 | 1,118 | 3,391 | 3,021 |
Total assets | 132,415 | 114,039 | 132,415 | 114,039 |
Americas [Member] | Subtotal [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 34,509 | 36,378 | 109,587 | 89,590 |
Americas [Member] | Eliminations [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Intercompany sales | (746) | (1,577) | (3,286) | (8,208) |
Americas [Member] | Mobile communication [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 21,270 | 16,609 | 58,767 | 47,202 |
Americas [Member] | Mobile communication [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 108 | 205 | 391 | 571 |
Americas [Member] | Mobile communication [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 181 | 99 | 409 | 342 |
Americas [Member] | Mobile communication [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,001 | 1,270 | 2,566 | 2,777 |
Americas [Member] | Guidance and stabilization [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 2,026 | 1,720 | 4,889 | 4,848 |
Americas [Member] | Guidance and stabilization [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 3,700 | 2,718 | 11,583 | 7,925 |
Americas [Member] | Guidance and stabilization [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,437 | 3,407 | 5,895 | 7,758 |
Americas [Member] | Guidance and stabilization [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 4,040 | 8,773 | 21,801 | 9,959 |
Europe and Asia [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Intercompany sales | 549 | 221 | 1,383 | 1,271 |
Net sales | 6,453 | 4,021 | 17,039 | 16,187 |
Segment net income (loss) | (301) | (251) | (404) | (798) |
Depreciation and amortization | 408 | 514 | 910 | 356 |
Total assets | 48,612 | 20,062 | 48,612 | 20,062 |
Europe and Asia [Member] | Subtotal [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 7,002 | 4,242 | 18,422 | 17,458 |
Europe and Asia [Member] | Eliminations [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Intercompany sales | (549) | (221) | (1,383) | (1,271) |
Europe and Asia [Member] | Mobile communication [Member] | United States [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 299 | 0 | 476 | 0 |
Europe and Asia [Member] | Mobile communication [Member] | Canada [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 0 | 0 | 0 | 0 |
Europe and Asia [Member] | Mobile communication [Member] | Europe [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 4,622 | 2,856 | 12,903 | 12,462 |
Europe and Asia [Member] | Mobile communication [Member] | Other geographic areas [Member] |  |  |  |  |
Schedule of operations by geographic segment |  |  |  |  |
Subtotal | 1,532 | 1,165 | 3,660 | 3,725 |
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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