| Other Financial Statement Data [Abstract] | Period [Axis] |
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2016-01-01 - 2016-12-31 |
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Other Financial Statement Data [Abstract] | |
Schedule Of Inventory Components | Inventories consist of the following: | | | | | | | | | | | | December 31, | (In thousands) | | 2016 | | 2015 | Raw materials and purchased parts | | $ | 6,475 |
| | $ | 6,787 |
| Work in process | | 826 |
| | 508 |
| Finished goods | | 4,230 |
| | 5,970 |
| Total inventories | | $ | 11,531 |
| | $ | 13,265 |
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Schedule Of Equipment And Leasehold Improvements | Equipment and leasehold improvements consist of the following: | | | | | | | | | | | | December 31, | (In thousands) | | 2016 | | 2015 | Equipment | | $ | 13,624 |
| | $ | 12,500 |
| Leasehold improvements | | 1,628 |
| | 1,588 |
| | | 15,252 |
| | 14,088 |
| Accumulated depreciation and amortization | | (12,814 | ) | | (11,720 | ) | | | $ | 2,438 |
| | $ | 2,368 |
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Schedule Of Intangible Assets | Intangible assets consist of the following: | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2016 | | December 31, 2015 | (In thousands) | | Gross Carrying Amount | | Accumulated Amortization | | Net | | Gross Carrying Amount | | Accumulated Amortization | | Net | Patents | | $ | 2,567 |
| | $ | (2,351 | ) | | $ | 216 |
| | $ | 2,513 |
| | $ | (2,253 | ) | | $ | 260 |
| Software | | 206 | | (82 | ) | | 124 | | 206 |
| | (53 | ) | | 153 |
| Marketing assets and customer relationships | | 101 | | (33 | ) | | 68 | | 101 |
| | (21 | ) | | 80 |
| Non-compete agreements | | 101 | | (71 | ) | | 30 | | 101 |
| | (45 | ) | | 56 |
| | | $ | 2,975 |
| | $ | (2,537 | ) | | $ | 438 |
| | $ | 2,921 |
| | $ | (2,372 | ) | | $ | 549 |
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Schedule Of Amortization Expense For Intangible Assets | Amortization expense for the years ended December 31, 2016 and 2015 is as follows: | | | | | | | | | | | | | | Year Ended December 31, | | Weighted Avg. Remaining Life-Years at December 31, 2016 | (In thousands) | | 2016 | | 2015 | | Patents | | $ | 98 |
| | $ | 110 |
| | 2.5 | Software | | 29 |
| | 29 |
| | 4.2 | Marketing assets and customer relationships | | 12 |
| | 12 |
| | 5.8 | Non-compete agreements | | 26 |
| | 25 |
| | 1.2 | | | $ | 165 |
| | $ | 176 |
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Schedule of Accrued Expenses | Accrued expenses consist of the following: | | | | | | | | | | | | December 31, | (In thousands) | | 2016 | | 2015 | Wages and benefits | | $ | 2,673 |
| | $ | 1,014 |
| Warranty liability | | 717 |
| | 584 |
| Other | | 366 |
| | 361 |
| | | $ | 3,756 |
| | $ | 1,959 |
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Other Noncurrent Liabilities | Other liabilities consist of the following: | | | | | | | | | | | | December 31, | (In thousands) | | 2016 | | 2015 | Deferred rent | | $ | 111 |
| | $ | 204 |
| Warranty liability | | 73 |
| | 61 |
| Deferred warranty revenue | | 66 |
| | 3 |
| | | $ | 250 |
| | $ | 268 |
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Schedule Of Changes In Estimated Warranty Liability | A reconciliation of the changes in our estimated warranty liability is as follows: | | | | | | | | | | | | Year Ended December 31, | (In thousands) | | 2016 | | 2015 | Balance at beginning of period | | $ | 645 |
| | $ | 839 |
| Accrual for warranties | | 688 |
| | 441 |
| Warranty revision | | (53 | ) | | (19 | ) | Settlements made during the period | | (490 | ) | | (616 | ) | Balance at end of period | | 790 |
| | 645 |
| Current portion of estimated warranty liability | | (717 | ) | | (584 | ) | Long-term estimated warranty liability | | $ | 73 |
| | $ | 61 |
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Schedule Of Changes In Deferred Warranty Revenue | A reconciliation of the changes in our deferred warranty revenue is as follows: | | | | | | | | | | | | Year Ended December 31, | (In thousands) | | 2016 | | 2015 | Balance at beginning of period | | $ | 199 |
| | $ | 475 |
| Revenue deferrals | | 581 |
| | 353 |
| Amortization of deferred revenue | | (434 | ) | | (629 | ) | Total deferred warranty revenue | | 346 |
| | 199 |
| Current portion of deferred warranty revenue | | (280 | ) | | (196 | ) | Long-term deferred warranty revenue | | $ | 66 |
| | $ | 3 |
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