Summary of Significant Accounting Policies - Summary of the Calculation of Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accounting Policies [Abstract]
Net income (loss) resulting from operations available to common stockholders	$ (23,630)	$ 4,975	$ (41,250)	$ (1,297)
Weighted average common shares outstanding applicable to basic EPS	24,461,488	24,361,680	24,440,067	24,336,677
Effect of dilutive stock options		16,543
Effect of restricted stock grants		228,944
Adjusted weighted average common shares outstanding applicable to diluted EPS	24,461,488	24,607,167	24,440,067	24,336,677
Basic net income (loss) per share	$ (0.97)	$ 0.20	$ (1.69)	$ (0.05)
Diluted net income (loss) per share	$ (0.97)	$ 0.20	$ (1.69)	$ (0.05)