Net Income (Loss) Per Share - Basic and Diluted Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Allocation of undistributed consolidated net loss				$ (37,199)	$ (104,686)
Deemed dividend				0	(50,204)
Net income (loss) attributable to stockholders – Basic		$ 9,371	$ (61,389)	(37,199)	(154,890)
Net income (loss) attributable to stockholders – Diluted		$ 9,371	$ (61,389)	$ (37,199)	$ (154,890)
Weighted-average shares – Basic (shares)	[1]	97,785,089	70,304,166	95,239,769	78,406,162
Weighted-average shares – Diluted (shares)	[1]	102,031,088	70,304,166	95,239,769	78,406,162
Net income (loss) per share attributable to common stockholders – Basic ($ per share)	[1]	$ 0.10	$ (0.87)	$ (0.39)	$ (1.98)
Net income (loss) per share attributable to common stockholders – Diluted ($ per share)	[1]	$ 0.09	$ (0.87)	$ (0.39)	$ (1.98)
Preferred stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Allocation of undistributed consolidated net loss				$ (514)	$ (21,872)
Deemed dividend				0	50,204
Net income (loss) attributable to stockholders – Basic		$ 0	$ (17,082)	(514)	28,332
Net income (loss) attributable to stockholders – Diluted		$ 0	$ (17,082)	$ (514)	$ 28,332
Weighted-average shares – Basic (shares)	[1]	0	19,562,714	1,317,062	11,071,212
Weighted-average shares – Diluted (shares)	[1]	0	19,562,714	1,317,062	11,071,212
Net income (loss) per share attributable to common stockholders – Basic ($ per share)	[1]	$ 0.00	$ (0.87)	$ (0.39)	$ 2.56
Net income (loss) per share attributable to common stockholders – Diluted ($ per share)	[1]	$ 0.00	$ (0.87)	$ (0.39)	$ 2.56

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