Earnings Per Common Share ("EPS") - Components of Basic and Diluted EPS Computations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
EPS — basic and diluted:
Net income (loss) (numerator)	$ 1,721	$ (5,265)	$ (9,795)	$ (14,432)	$ (29,023)	$ (25,998)	$ (13,339)	$ (69,453)
Weighted average common shares (denominator), Basic	268,732			259,300			266,126	254,974
Net income (loss) (numerator)	$ 3,578			$ (14,432)			$ (13,339)	$ (69,453)
Weighted average common shares	268,732			259,300			266,126	254,974
Effect of dilutive securities - common shares issuable	55,038
Adjusted weighted average common shares (denominator)	323,770			259,300			266,126	254,974
Net income (loss) per share - basic	$ 0.01			$ (0.06)			$ (0.05)	$ (0.27)
Net income (loss) per share - diluted	$ 0.01			$ (0.06)			$ (0.05)	$ (0.27)