Earnings Per Common Share - Summary of Reconciliation of Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic Earnings (Loss) per Common Share:
Net loss attributable to common shares — basic	$ (2,871)	$ (8,352)	$ (26,515)	$ (24,721)
Weighted average common shares outstanding — basic	16,520	12,241	16,428	12,129
Basic earnings (loss) per common share	$ (0.17)	$ (0.68)	$ (1.61)	$ (2.04)
Diluted Earnings (Loss) per Common Share:
Net loss attributable to common shares — diluted	$ (2,871)	$ (8,352)	$ (26,515)	$ (24,721)
Weighted average common shares outstanding — diluted	16,520	12,241	16,428	12,129
Diluted earnings (loss) per common share	$ (0.17)	$ (0.68)	$ (1.61)	$ (2.04)