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Financial Statement Components (Tables) | 9 Months Ended
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Sep. 26, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Components of condensed consolidated balance sheets |
Condensed Consolidated Balance Sheets Details | At
| September 26, 2015 |  | December 27, 2014
Inventories: |  |  |
Raw materials and sub-assemblies | $ | 24,999 |  |  | $ | 19,463 |
Work in process | 14,463 |  |  | 7,723 |
Finished goods | 8,936 |  |  | 7,919 |
Inventories | 48,398 |  |  | 35,105 |
Inventories-delivered systems | 1,543 |  |  | 1,912 |
Total inventories | $ | 49,941 |  |  | $ | 37,017 |
Property, plant and equipment, net(1): |  |  |
Land | $ | 15,568 |  |  | $ | 15,572 |
Building and improvements | 19,795 |  |  | 19,641 |
Machinery and equipment | 32,085 |  |  | 29,456 |
Furniture and fixtures | 2,264 |  |  | 2,225 |
Software | 8,094 |  |  | 7,942 |
Capital in progress | 2,414 |  |  | 3,512 |
Total property, plant and equipment, gross | 80,220 |  |  | 78,348 |
Accumulated depreciation and amortization | (34,276 | ) |  | (28,715 | )
Total property, plant and equipment, net | $ | 45,944 |  |  | $ | 49,633 |
(1)Total depreciation and amortization expense for the three months ended September 26, 2015 and September 27, 2014 was $1.8 million and $1.7 million, respectively. Total depreciation and amortization expense for the nine months ended September 26, 2015 and September 27, 2014 was $5.2 million and $4.9 million, respectively. |  |  |
Other current liabilities: |  |  |
Accrued warranty | $ | 4,291 |  |  | $ | 2,953 |
Accrued restructuring | 341 |  |  | 997 |
Accrued professional services | 671 |  |  | 778 |
Fair value of current portion of contingent payments to Zygo Corporation related to acquisition | 1,159 |  |  | 1,385 |
Other | 2,960 |  |  | 2,152 |
Total other current liabilities | $ | 9,422 |  |  | $ | 8,265 |
Components of accumulated other comprehensive income (loss) | Components of Accumulated Other Comprehensive Income (Loss)
| Foreign Currency Translations |  | Defined Benefit Pension Plans |  | Unrealized Income (Loss) on Investment |  | Accumulated Other Comprehensive Income
Balance as of December 27, 2014 | $ | (2,604 | ) |  | $ | (134 | ) |  | $ | (31 | ) |  | $ | (2,769 | )
Current period change | (1,980 | ) |  | — |  |  | 42 |  |  | (1,938 | )
Balance as of September 26, 2015 | $ | (4,584 | ) |  | $ | (134 | ) |  | $ | 11 |  |  | $ | (4,707 | )

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