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Warrants Disclosure (Details) $ / shares in Units, $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) | Dec. 17, 2019 shares | Jul. 08, 2019 USD ($) Measurement_Input | Jul. 01, 2019 USD ($) shares | Sep. 26, 2016 $ / shares shares
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  |  |  |  |  | $ 4.76
Common Stock, Shares, Issued | shares | 98,204,000 | 91,875,000 |  |  |  |  |
Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Measurement_Input |  |  |  |  | 0.019 |  |
Measurement Input, Option Volatility [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Measurement_Input |  |  |  |  | 0.486 |  |
Measurement Input, Expected Term [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term |  |  |  |  | 4 years 2 months 12 days |  |
Measurement Input, Expected Dividend Rate [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Measurement_Input |  |  |  |  | 0 |  |
Comcast Milestones Achievement [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding | shares |  |  |  |  |  | 1,954,042 |
Comcast CableOS Software License Agreement [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Fair Value of Fully Vested Warrants | $ |  |  |  |  | $ 16.1 |  |
Comcast Warrants Vested Prior to July 2019 [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Fair Value of Fully Vested Warrants | $ |  |  |  |  |  | $ 3.9 |
Comcast Warrants Vested July 2019 [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Fair Value of Fully Vested Warrants | $ |  |  |  |  |  | $ 20.0 |
Comcast Warrants Exercise in its Entirety [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Common Stock, Shares, Issued | shares |  |  |  | 3,217,547 |  |  |
Revenue from Contract with Customer Benchmark [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Reduction to Revenues In Connection with Amortization of the Warrant | $ | $ 1.7 | $ 13.6 | $ 1.2 |  |  |  |
Maximum [Member] | Comcast Warrant Expires September 26, 2023 [Member] |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Warrant grants to Comcast subject to vesting | shares |  |  |  |  |  |  | 7,816,162

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