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Supplementary Balance Sheet Information (Tables) | 9 Months Ended
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Sep. 28, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract] |
Inventories | Inventories
| September 28, |  |  | December 31, |
| 2018 |  |  | 2017 |
Raw materials | $ | 61,509 |  |  | $ | 57,277 |
Work-in-process |  | 16,369 |  |  |  | 14,847 |
Finished goods |  | 18,374 |  |  |  | 16,443 |
Demo and consigned inventory |  | 2,665 |  |  |  | 2,711 |
Total inventories | $ | 98,917 |  |  | $ | 91,278 |
Accrued Expenses and Other Current Liabilities | Accrued Expenses and Other Current Liabilities
| September 28, |  |  | December 31, |
| 2018 |  |  | 2017 |
Accrued compensation and benefits | $ | 23,926 |  |  | $ | 17,348 |
Accrued warranty |  | 5,041 |  |  |  | 4,835 |
Customer deposits |  | 3,392 |  |  |  | 3,634 |
Other |  | 16,306 |  |  |  | 17,497 |
Total | $ | 48,665 |  |  | $ | 43,314 |
Accrued Warranty | Accrued Warranty
| Nine Months Ended |
| September 28, 2018 |  |  | September 29, 2017 |
Balance at beginning of the period | $ | 4,835 |  |  | $ | 3,142 |
Provision charged to cost of revenue |  | 2,503 |  |  |  | 2,084 |
Warranty liabilities acquired from acquisitions |  | — |  |  |  | 1,307 |
Use of provision |  | (2,243 | ) |  |  | (1,818 | )
Foreign currency exchange rate changes |  | (54 | ) |  |  | 58 |
Balance at end of period | $ | 5,041 |  |  | $ | 4,773 |

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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