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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions | Sep. 25, 2020 | Dec. 31, 2019 | Dec. 31, 2017
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Other Commitments [Line Items] |  |  |
Non-cancelable purchase commitments | $ 50.9 |  |
Maximum amount of potential future payments under the company's financial guarantees | 2.7 | $ 2.7 |
Indemnification [Member] |  |  |
Other Commitments [Line Items] |  |  |
Accrual for indemnification provisions | 0.0 |  |
Domestic Line of Credit [Member] | Performance Guarantee [Member] | Guarantee Obligations [Member] |  |  |
Other Commitments [Line Items] |  |  |
Bank Guarantees and Standby Letters of Credit | 2.3 |  |
Foreign Line of Credit [Member] | Performance Guarantee [Member] | Guarantee Obligations [Member] |  |  |
Other Commitments [Line Items] |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  | $ 2.0
JPMorgan Chase Bank, N.A. [Member] | Revolving Credit Facility [Member] |  |  |
Other Commitments [Line Items] |  |  |
Maximum amount of potential future payments under the company's financial guarantees | 0.2 | 0.2 |
Line of Credit Facility, Current Borrowing Capacity | 0.0 | 0.0 |
Foreign Line of Credit [Member] | Performance Guarantee [Member] |  |  |
Other Commitments [Line Items] |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding | $ 0.0 | $ 0.0 |

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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(17)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(19)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 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(25)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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