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WARRANTS (Details) $ / shares in Units, $ in Millions | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 17, 2019 shares | Jul. 08, 2019 USD ($) | Jul. 01, 2019 USD ($) | Jun. 28, 2019 shares | Sep. 26, 2016 $ / shares shares
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 4.76
Common stock, shares issued (in shares) | shares | 102,959,000 | 98,204,000 |  |  |  |  |  |
Measurement Input, Risk Free Interest Rate |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrants and rights outstanding, measurement input (as a percent) |  |  |  |  | 0.019 |  |  |
Measurement Input, Option Volatility |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrants and rights outstanding, measurement input (as a percent) |  |  |  |  | 0.486 |  |  |
Measurement Input, Expected Term |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrants and rights outstanding, term |  |  |  |  | 4 years 2 months 12 days |  |  |
Measurement Input, Expected Dividend Rate |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrants and rights outstanding, measurement input (as a percent) |  |  |  |  | 0 |  |  |
Comcast Milestones Achievement |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Class of warrant or right, outstanding (in shares) | shares |  |  |  |  |  |  | 1,954,042 |
Comcast CableOS Software License Agreement |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Fair value of fully vested warrants | $ |  |  |  |  | $ 16.1 |  |  |
Comcast Warrants Vested Prior to July 2019 |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Fair value of fully vested warrants | $ |  |  |  |  |  | $ 3.9 |  |
Comcast Warrants Vested July 2019 |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Fair value of fully vested warrants | $ |  |  |  |  |  | $ 20.0 |  |
Comcast Warrants Exercise in its Entirety |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) | shares |  |  |  | 3,217,547 |  |  |  |
Revenue from Contract with Customer Benchmark |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Reduction to revenues in connection with amortization of the warrant | $ | $ 1.7 | $ 1.7 | $ 13.6 |  |  |  |  |
Maximum | Comcast Warrant Expires September 26, 2023 |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |
Warrant grants to Comcast subject to vesting (in shares) | shares |  |  |  |  |  |  |  | 7,816,162

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