Net Loss Per Share - Basic and Diluted Net Loss Per Share (Parenthetical) (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of net loss per share	11,200,000	9,600,000	11,200,000	9,600,000
2024 Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of shares excluded from computation of diluted EPS	5,712,253		5,712,253		7,763,970
2027 Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Conversion of shares excluded from computation of diluted EPS	8,100,485		8,100,485