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Commitments and Contingencies (Tables) | 9 Months Ended
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Sep. 25, 2020
Commitments and Contingencies Disclosure [Abstract] |
Summary of Warranty Accrual Included in Accrued Liabilities | Activity for the Company’s warranty accrual, which is included in “Accrued and other current liabilities”, is summarized below (in thousands):
| Three months ended |  | Nine months ended
| September 25, 2020 |  | September 27, 2019 |  | September 25, 2020 |  | September 27, 2019
Balance at beginning of period | $ | 3,818 |  |  | $ | 4,802 |  |  | $ | 4,314 |  |  | $ | 4,869 |
Accrual for current period warranties | 673 |  |  | 1,170 |  |  | 2,342 |  |  | 4,143 |
Warranty costs incurred | (910 | ) |  | (1,391 | ) |  | (3,075 | ) |  | (4,431 | )
Balance at end of period | $ | 3,581 |  |  | $ | 4,581 |  |  | $ | 3,581 |  |  | $ | 4,581 |

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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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