Common Stock Warrant Liability	9 Months Ended
Sep. 30, 2021
Warrants And Rights Note Disclosure [Abstract]
Common Stock Warrant Liability	Note 7 – Common Stock Warrant Liability Warrant Agreement and Share Purchase Agreement On October 12, 2017, the Company issued to a “Strategic Partner” a warrant to purchase Series W common stock (the “Warrant Agreement”) for a non-refundable payment of $60 million. This Series W common stock warrant (the “Series W Warrant”) had an initial expiration date of December 31, 2018 unless extended as provided for in the Warrant Agreement. On December 27, 2018, the Strategic Partner chose to extend the expiration date of the Series W Warrant, by making an additional non-refundable payment of $40 million, until the sooner of the achievement of performance milestones (as defined in the Warrant Agreement) or November 22, 2021. On March 18, 2020, the Company and the Strategic Partner signed an amendment to the Warrant Agreement that removed the milestone triggers for early exercise and changed the expiration date to March 31, 2021. Concurrent with the Warrant Agreement, the Strategic Partner and the Company entered into a Share Purchase Agreement (the “Purchase Agreement”). Under the Purchase Agreement, the Strategic Partner purchased one share of the Company’s non-voting $0.001 par value per share Series G common stock for $0.01. Upon exercise of the Series W Warrant, the Strategic Partner would have received one share of voting, $0.001 par value, Series W common stock. Per the Warrant Agreement, the exercise price of the Series W Warrant was $630.0 million plus adjustments for the Company’s cash, working capital, indebtedness, and transaction expenses, subject to an escrow holdback of $92.0 million and a shareholder representative holdback of $0.5M. The Warrant Agreement also provided for potential aggregate milestone payments of up to $827 million for various sales-based and operating milestones and $185 million for certain regulatory milestones, either at the time of the Series W Warrant’s exercise or at dates subsequent, as defined in the Warrant Agreement. Upon notice of exercise of the Series W Warrant by the Strategic Partner and receipt of the required funds, a Special Redemption, as defined in the Company’s Articles of Incorporation, would have triggered automatic redemption of all the Company’s outstanding capital instruments, except for the Series G common stock and Series W common stock, and the Strategic Partner would have acquired the Company. Special Redemption On October 25, 2017, the Company adopted the 12th Amended and Restated Articles of Incorporation (the “Amendment”). Under Article IV of the Amendment, if the Strategic Partner had exercised the Series W Warrant, an automatic redemption, conversion, termination and cancellation of all then outstanding shares of the Company’s capital stock, options and warrants would have occurred without any further action required. Immediately prior to the automatic redemption, all outstanding preferred shares would have converted to common shares, unvested stock options would have accelerated and became fully vested and all stock options would have terminated along with any preferred stock warrants outstanding. Shareholders, option holders and warrant holders would have had the right to receive the initial per share price less the strike price as defined in the Warrant Agreement. The Strategic Partner would have advanced (through an exchange agent) the funds to the Company, which would then have disbursed the funds to all shareholders, option holders and warrant holders. If the Series W Warrant was terminated or expired unexercised, Article IV of the Amendment would terminate and would be of no further force and effect. In December 2020, management determined that exercise of the Series W Warrant was no longer probable, at which point further accretion to redemption value of common stock, preferred stock and stock options ceased. On March 31, 2021, the Series W Warrant terminated as the Strategic Partner did not provide notice of exercise. A gain of $5.0 million was recorded on the expiration of the Series W Warrant in the accompanying condensed consolidated statements of operations and comprehensive income (loss) for the nine months ended September 30, 2021. Upon termination, amounts recorded in temporary equity for common stock and stock options were reclassified to common stock and additional paid-in capital within permanent equity as these instruments were no longer redeemable.

Common Stock Warrant Liability

9 Months Ended

Sep. 30, 2021

Warrants And Rights Note Disclosure [Abstract]

Note 7 – Common Stock Warrant Liability

Warrant Agreement and Share Purchase Agreement

On October 12, 2017, the Company issued to a “Strategic Partner” a warrant to purchase Series W common stock (the “Warrant Agreement”) for a non-refundable payment of $60 million. This Series W common stock warrant (the “Series W Warrant”) had an initial expiration date of December 31, 2018 unless extended as provided for in the Warrant Agreement. On December 27, 2018, the Strategic Partner chose to extend the expiration date of the Series W Warrant, by making an additional non-refundable payment of $40 million, until the sooner of the achievement of performance milestones (as defined in the Warrant Agreement) or November 22, 2021. On March

18, 2020, the Company and the Strategic Partner signed an amendment to the Warrant Agreement that removed the milestone triggers for early exercise and changed the expiration date to March 31, 2021.

Concurrent with the Warrant Agreement, the Strategic Partner and the Company entered into a Share Purchase Agreement (the “Purchase Agreement”). Under the Purchase Agreement, the Strategic Partner purchased one share of the Company’s non-voting $0.001 par value per share Series G common stock for $0.01. Upon exercise of the Series W Warrant, the Strategic Partner would have received one share of voting, $0.001 par value, Series W common stock. Per the Warrant Agreement, the exercise price of the Series W Warrant was $630.0 million plus adjustments for the Company’s cash, working capital, indebtedness, and transaction expenses, subject to an escrow holdback of $92.0 million and a shareholder representative holdback of $0.5M. The Warrant Agreement also provided for potential aggregate milestone payments of up to $827 million for various sales-based and operating milestones and $185 million for certain regulatory milestones, either at the time of the Series W Warrant’s exercise or at dates subsequent, as defined in the Warrant Agreement. Upon notice of exercise of the Series W Warrant by the Strategic Partner and receipt of the required funds, a Special Redemption, as defined in the Company’s Articles of Incorporation, would have triggered automatic redemption of all the Company’s outstanding capital instruments, except for the Series G common stock and Series W common stock, and the Strategic Partner would have acquired the Company.

Special Redemption

On October 25, 2017, the Company adopted the 12th Amended and Restated Articles of Incorporation (the “Amendment”). Under Article IV of the Amendment, if the Strategic Partner had exercised the Series W Warrant, an automatic redemption, conversion, termination and cancellation of all then outstanding shares of the Company’s capital stock, options and warrants would have occurred without any further action required. Immediately prior to the automatic redemption, all outstanding preferred shares would have converted to common shares, unvested stock options would have accelerated and became fully vested and all stock options would have terminated along with any preferred stock warrants outstanding. Shareholders, option holders and warrant holders would have had the right to receive the initial per share price less the strike price as defined in the Warrant Agreement. The Strategic Partner would have advanced (through an exchange agent) the funds to the Company, which would then have disbursed the funds to all shareholders, option holders and warrant holders. If the Series W Warrant was terminated or expired unexercised, Article IV of the Amendment would terminate and would be of no further force and effect.

In December 2020, management determined that exercise of the Series W Warrant was no longer probable, at which point further accretion to redemption value of common stock, preferred stock and stock options ceased.

On March 31, 2021, the Series W Warrant terminated as the Strategic Partner did not provide notice of exercise. A gain of $5.0 million was recorded on the expiration of the Series W Warrant in the accompanying condensed consolidated statements of operations and comprehensive income (loss) for the nine months ended September 30, 2021. Upon termination, amounts recorded in temporary equity for common stock and stock options were reclassified to common stock and additional paid-in capital within permanent equity as these instruments were no longer redeemable.