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Stock-Based Compensation - Schedule of Allocation of Recognized Period Cost (Details) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 29, 2019 | Sep. 30, 2018 | Sep. 29, 2019 | Sep. 30, 2018
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total costs and expenses | $ 748,000 | $ 516,000 | $ 2,490,000 | $ 1,427,000
Stock-based compensation, capitalized costs | 0 | 0 | 0 | 0
Cost of revenue |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total costs and expenses | 15,000 | 30,000 | 59,000 | 99,000
Research and development |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total costs and expenses | 521,000 | 220,000 | 1,708,000 | 610,000
Selling, general and administrative |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |
Total costs and expenses | $ 212,000 | $ 266,000 | $ 723,000 | $ 718,000

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- Definition Amount of cost capitalized for award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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