Earnings (Loss) Per Share - Summary of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Basic and diluted loss per share:
Net loss	$ (54,014)	$ (67,739)
Weighted average common shares outstanding - basic	42,425,295	40,382,578
Weighted average common shares outstanding - diluted	42,425,295	40,382,578
Basic loss per share	$ (1.27)	$ (1.68)
Diluted loss per share	$ (1.27)	$ (1.68)