Sale of Aquinox Canada	12 Months Ended
Dec. 31, 2021
Subsidiary Sale Of Stock [Abstract]
Sale of Aquinox Canada	Sale of Aquinox CanadaOn July 31, 2020, the Company sold all issued and outstanding capital stock of its Canadian subsidiary, Aquinox Canada, to an unrelated third party for cash consideration of $8.2 million. The Company concluded that the sale did not meet the criteria for discontinued operations reporting as it did not represent a strategic shift that had a major effect on the Company’s operations and financial results. As of the date of sale, Aquinox Canada’s remaining assets included intellectual property and other assets developed through past research and development activities, all of which had no book value. The transaction resulted in a net gain on sale of $7.8 million, after deducting $0.4 million in transaction costs, which is recorded as a reduction of operating loss in the Company’s consolidated statement of operations. The sale of Aquinox Canada triggered a significant capital loss carryforward for tax purposes. However, the deferred tax asset related to the capital loss carryforward will be subject to a full valuation allowance as the Company has determined that it is more likely than not that the benefit of the loss will not be realized. Refer to Note 10, Income taxes for further information.

Sale of Aquinox Canada

12 Months Ended

Dec. 31, 2021

Sale of Aquinox CanadaOn July 31, 2020, the Company sold all issued and outstanding capital stock of its Canadian subsidiary, Aquinox Canada, to an unrelated third party for cash consideration of $8.2 million. The Company concluded that the sale did not meet the criteria for discontinued operations reporting as it did not represent a strategic shift that had a major effect on the Company’s operations and financial results. As of the date of sale, Aquinox Canada’s remaining assets included intellectual property and other assets developed through past research and development activities, all of which had no book value. The transaction resulted in a net gain on sale of $7.8 million, after deducting $0.4 million in transaction costs, which is recorded as a reduction of operating loss in the Company’s consolidated statement of operations. The sale of Aquinox Canada triggered a significant capital loss carryforward for tax purposes. However, the deferred tax asset related to the capital loss carryforward will be subject to a full valuation allowance as the Company has determined that it is more likely than not that the benefit of the loss will not be realized. Refer to Note 10, Income taxes for further information.