Net Income (Loss) Per Share - Basic and Diluted Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Allocation of undistributed consolidated net loss				$ (10,434)	$ (129,968)
Deemed dividend				0	(50,204)
Net income (loss) attributable to stockholders – Basic		$ 27,185	$ (27,779)	(10,434)	(180,172)
Net income (loss) attributable to stockholders – Diluted		$ 27,185	$ (27,779)	$ (10,434)	$ (180,172)
Weighted-average shares – Basic (shares)	[1]	99,073,507	73,566,385	96,531,725	76,781,157
Weighted-average shares – Diluted (shares)	[1]	106,108,662	73,566,385	96,531,725	76,781,157
Net income (loss) per share attributable to common stockholders – Basic ($ per share)	[1]	$ 0.27	$ (0.38)	$ (0.11)	$ (2.35)
Net income (loss) per share attributable to common stockholders – Diluted ($ per share)	[1]	$ 0.26	$ (0.38)	$ (0.11)	$ (2.35)
Preferred stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Allocation of undistributed consolidated net loss				$ (94)	$ (30,915)
Deemed dividend				0	50,204
Net income (loss) attributable to stockholders – Basic		$ 0	$ (6,546)	(94)	19,289
Net income (loss) attributable to stockholders – Diluted		$ 0	$ (6,546)	$ (94)	$ 19,289
Weighted-average shares – Basic (shares)	[1]	0	17,335,485	873,217	13,174,545
Weighted-average shares – Diluted (shares)	[1]	0	17,335,485	873,217	13,174,545
Net income (loss) per share attributable to common stockholders – Basic ($ per share)	[1]	$ 0.00	$ (0.38)	$ (0.11)	$ 1.46
Net income (loss) per share attributable to common stockholders – Diluted ($ per share)	[1]	$ 0.00	$ (0.38)	$ (0.11)	$ 1.46

[1] See “Notes to Condensed Consolidated Financial Statements – Note 4. Net Income (Loss) Per Share” for additional information.