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Warrants (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 28, 2019 USD ($) | Jun. 29, 2018 USD ($) | Jun. 28, 2019 USD ($) | Jun. 29, 2018 USD ($) | Jul. 09, 2019 shares | Dec. 31, 2018 Measurement_Input | Jul. 31, 2018 shares | Sep. 26, 2016 $ / shares shares
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrants, Exercise Price of Warrants | $ / shares |  |  |  |  |  |  |  | $ 4.76
Reduction to net revenues - amortization of the Warrant | $ |  |  | $ 48 | $ 395 |  |  |  |
Comcast Product Supply Agreement [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Right to purchase shares vested |  |  |  |  |  |  |  | 781,617
Comcast Milestones Achievement [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Right to purchase shares vested |  |  |  |  |  |  | 1,172,425 |
Measurement Input, Expected Dividend Rate [Member] | Comcast Warrant Vesting Tranche July 31, 2018 [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Measurement_Input |  |  |  |  |  | 0 |  |
Maximum [Member] | Comcast Warrant Expires September 26, 2023 [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrant Grant to Purchase Shares of Common Stock |  |  |  |  |  |  |  | 7,816,162
Revenue from Contract with Customer [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Reduction to net revenues - amortization of the Warrant | $ | $ 23 | $ 300 | $ 48 | $ 395 |  |  |  |
Subsequent Event [Member] | Comcast’s Election for Enterprise License Pricing [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Right to purchase shares vested |  |  |  |  | 781,617 |  |  |

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- Definition Adjustment for noncash service expenses paid for by granting of warrants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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