Earnings (Loss) Per Share - Summary of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic and diluted loss per share:
Net loss	$ (12,526)	$ (13,491)
Weighted average common shares outstanding - basic	42,529,017	42,302,775
Weighted average common shares outstanding - diluted	42,529,017	42,302,775
Basic loss per share	$ (0.29)	$ (0.32)
Diluted loss per share	$ (0.29)	$ (0.32)