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Acquisitions (Tables) - Z-Wave | 12 Months Ended
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Dec. 28, 2019
Acquisitions |
Schedule of purchase price allocation | The purchase price was allocated as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Weighted-Average
​ | ​ | ​ | ​ | ​ | Amortization Period
​ |  | Amount |  | (Years)
Intangible assets: | ​ | ​ | ​ | ​ | ​
In-process research and development | ​ | $ | 20,900 |  | Not amortized
Developed technology | ​ |  | 69,875 |  | 7
Customer relationships | ​ |  | 25,000 |  | 4
Trademarks | ​ |  | 9,900 |  | 7
​ | ​ |  | 125,675 | ​ | ​
Cash and cash equivalents | ​ |  | 2,841 | ​ | ​
Accounts receivable | ​ | ​ | 5,311 | ​ | ​
Inventory | ​ | ​ | 15,581 | ​ | ​
Other current assets | ​ |  | 329 | ​ | ​
Goodwill | ​ |  | 109,117 | ​ | ​
Other non-current assets | ​ | ​ | 2,587 | ​ | ​
Accounts payable | ​ | ​ | (3,306) | ​ | ​
Other current liabilities | ​ | ​ | (8,918) | ​ | ​
Other non-current liabilities | ​ |  | (6,648) | ​ | ​
Total purchase price | ​ | $ | 242,569 | ​ | ​
Schedule of pro forma results of operations | The pro forma results of operations are presented for informational purposes only and are not necessarily indicative of the results of operations that would have been achieved if the acquisition had taken place on January 1, 2017 or of results that may occur in the future (in thousands, except per share data): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended
​ | ​ | December 29, | ​ | December 30,
​ |  | 2018 |  | 2017
​ | ​ | (Unaudited)
Revenues |  | $ | 882,109 | ​ | $ | 824,009
Net income |  | $ | 87,874 | ​ | $ | 27,958
​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per share: | ​ | ​ | ​ | ​ | ​ | ​
Basic |  | $ | 2.04 | ​ | $ | 0.66
Diluted |  | $ | 2.00 | ​ | $ | 0.65

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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