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Financial Statement Components (Tables) | 6 Months Ended
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Jun. 27, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Components of condensed consolidated balance sheets |
Condensed Consolidated Balance Sheets Details | At
| June 27, 2015 |  | December 27, 2014
Inventories: |  |  |
Raw materials and sub-assemblies | $ | 23,676 |  |  | $ | 19,463 |
Work in process | 11,003 |  |  | 7,723 |
Finished goods | 6,860 |  |  | 7,919 |
Inventories | 41,539 |  |  | 35,105 |
Inventories-delivered systems | 1,574 |  |  | 1,912 |
Total inventories | $ | 43,113 |  |  | $ | 37,017 |
Property, plant and equipment, net(1): |  |  |
Land | $ | 15,572 |  |  | $ | 15,572 |
Building and improvements | 19,817 |  |  | 19,641 |
Machinery and equipment | 31,017 |  |  | 29,456 |
Furniture and fixtures | 2,258 |  |  | 2,225 |
Software | 7,965 |  |  | 7,942 |
Capital in progress | 3,554 |  |  | 3,512 |
Total property, plant and equipment, gross | 80,183 |  |  | 78,348 |
Accumulated depreciation and amortization | (32,642 | ) |  | (28,715 | )
Total property, plant and equipment, net | $ | 47,541 |  |  | $ | 49,633 |
(1)Total depreciation and amortization expense for the six months ended June 27, 2015 and June 28, 2014 was $3.4 million and $3.2 million, respectively. |  |  |
Other current liabilities: |  |  |
Accrued warranty | $ | 3,792 |  |  | $ | 2,953 |
Accrued restructuring | 424 |  |  | 997 |
Accrued professional services | 787 |  |  | 778 |
Fair value of current portion of contingent payments to Zygo Corporation related to acquisition | 1,119 |  |  | 1,385 |
Other | 2,099 |  |  | 2,152 |
Total other current liabilities | $ | 8,221 |  |  | $ | 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 | (1,745 | ) |  | — |  |  | 25 |  |  | (1,720 | )
Balance as of June 27, 2015 | $ | (4,349 | ) |  | $ | (134 | ) |  | $ | (6 | ) |  | $ | (4,489 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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