Warrants	12 Months Ended
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Warrants Disclosure	WARRANTS On September 26, 2016, the Company granted a warrant to purchase shares of common stock (the “Warrant”) to Comcast pursuant to which Comcast may, subject to certain vesting provisions, purchase up to 7,816,162 shares of the Company’s common stock subject to adjustment in accordance with the terms of the Warrant, for a per share exercise price of $4.76. Comcast may exercise the Warrant for cash or on a net share basis. The Warrant expires on September 26, 2023 or the prior consummation of a change of control of the Company. Prior to the third quarter of fiscal 2019, Comcast had vested in 1,954,042 Warrant shares as a result of the achievement of certain milestones. On July 8 2019, in connection with the election by Comcast of enterprise licensing pricing for the Company’s CableOS software, the Company deemed that all of the remaining milestones and thresholds required to fulfill each of the vesting requirements of the Warrant were satisfied and achieved or otherwise waived such that all Warrant shares were fully vested and exercisable as of July 1, 2019. The remaining terms of the Warrant have not been modified or amended. The total fair value of the fully vested Warrants as of July 1, 2019 was $20.0 million, which includes $3.9 million in fair value for the Warrant shares which were vested prior to July 2019. The fair value of the Warrant that vested in connection with the CableOS software license agreement was estimated to be $16.1 million on July 8, 2019, using the Black-Scholes option pricing model. The assumptions utilized in the Black-Scholes model included the risk-free interest rate, expected volatility, and expected life in years. The risk-free interest rate was based on the U.S. Treasury yield curve rates with maturity terms similar to the expected life of the Warrant, which was determined to be 1.9%. Expected volatility was determined utilizing historical volatility over a period of time equal to the expected life of the Warrant, which was determined to be 48.6%. Expected life was equal to the remaining contractual term of the Warrant, which was determined to be 4.2 years. The dividend yield was assumed to be zero since the Company had not historically declared dividends and did not have any plans to declare dividends in the future. The fair value of the Warrant was considered as a payment made to the customer in the form of an equity instrument, and therefore was reduced from the transaction price of the Comcast CableOS software license agreement. The fair value of the Warrant was recorded as a component of “Prepaid expenses and other current assets” and “Other long-term assets” with a corresponding offset to “Additional paid-in capital” on the Company’s Consolidated Balance Sheets. This asset is amortized as a reduction to the Company’s revenue, based on the recognition pattern of the related transaction price. During the year ended December 31, 2019, the Company recorded $13.6 million, as a reduction to revenues in connection with amortization of the Warrant. During the year ended December 31, 2018 and 2017, the Company recorded $1.2 million and $0.2 million respectively, as a reduction to net revenues in connection with amortization of the Warrant. On December 17, 2019, Comcast net exercised the Warrant in its entirety, resulting in a net issuance of 3,217,547 shares. The Company delivered 804,387 shares to Comcast on December 20, 2019, with the remaining 2,413,160 shares were delivered in January 2020.

WARRANTS

On September 26, 2016, the Company granted a warrant to purchase shares of common stock (the “Warrant”) to Comcast pursuant to which Comcast may, subject to certain vesting provisions, purchase up to 7,816,162 shares of the Company’s common stock subject to adjustment in accordance with the terms of the Warrant, for a per share exercise price of $4.76. Comcast may exercise the Warrant for cash or on a net share basis. The Warrant expires on September 26, 2023 or the prior consummation of a change of control of the Company.

Prior to the third quarter of fiscal 2019, Comcast had vested in 1,954,042 Warrant shares as a result of the achievement of certain milestones. On July 8 2019, in connection with the election by Comcast of enterprise licensing pricing for the Company’s CableOS software, the Company deemed that all of the remaining milestones and thresholds required to fulfill each of the vesting requirements of the Warrant were satisfied and achieved or otherwise waived such that all Warrant shares were fully vested and exercisable as of July 1, 2019. The remaining terms of the Warrant have not been modified or amended. The total fair value of the fully vested Warrants as of July 1, 2019 was $20.0 million, which includes $3.9 million in fair value for the Warrant shares which were vested prior to July 2019.

The fair value of the Warrant that vested in connection with the CableOS software license agreement was estimated to be $16.1 million on July 8, 2019, using the Black-Scholes option pricing model. The assumptions utilized in the Black-Scholes model included the risk-free interest rate, expected volatility, and expected life in years. The risk-free interest rate was based on the U.S. Treasury yield curve rates with maturity terms similar to the expected life of the Warrant, which was determined to be 1.9%. Expected volatility was determined utilizing historical volatility over a period of time equal to the expected life of the Warrant, which was determined to be 48.6%. Expected life was equal to the remaining contractual term of the Warrant, which was determined to be 4.2 years. The dividend yield was assumed to be zero since the Company had not historically declared dividends and did not have any plans to declare dividends in the future.

The fair value of the Warrant was considered as a payment made to the customer in the form of an equity instrument, and therefore was reduced from the transaction price of the Comcast CableOS software license agreement.

The fair value of the Warrant was recorded as a component of “Prepaid expenses and other current assets” and “Other long-term assets” with a corresponding offset to “Additional paid-in capital” on the Company’s Consolidated Balance Sheets. This asset is amortized as a reduction to the Company’s revenue, based on the recognition pattern of the related transaction price.

During the year ended December 31, 2019, the Company recorded $13.6 million, as a reduction to revenues in connection with amortization of the Warrant. During the year ended December 31, 2018 and 2017, the Company recorded $1.2 million and $0.2 million respectively, as a reduction to net revenues in connection with amortization of the Warrant.

On December 17, 2019, Comcast net exercised the Warrant in its entirety, resulting in a net issuance of 3,217,547 shares. The Company delivered 804,387 shares to Comcast on December 20, 2019, with the remaining 2,413,160 shares were delivered in January 2020.