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Business combination - Additional Information (Details) - USD ($) $ in Thousands | Nov. 14, 2019 | Jun. 27, 2020 | Sep. 28, 2019
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Estimated goodwill |  | $ 15,545 | $ 1,005
Snips SAS |  |  |
Business Acquisition [Line Items] |  |  |
Percentage of business acquired | 100.00% |  |
Total purchase considerations | $ 36,300 |  |
Cash paid to shareholders | 35,600 |  |
Contingent consideration liability | 700 |  |
Finite-lived intangible assets |  | 25,200 |
Net assets acquired, excluding goodwill |  | 3,200 |
Estimated goodwill |  | $ 14,300 |
Acquisition related diligence costs | $ 1,400 |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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