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