Summary of Significant Accounting Policies - Summary of the Calculation of Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Net loss resulting from operations available to common stockholders	$ (3,977)	$ (7,500)	$ (17,620)	$ (6,272)
Weighted average common shares outstanding applicable to basic EPS	24,444,677	24,359,280	24,423,225	24,323,967
Adjusted weighted average common shares outstanding applicable to diluted EPS	24,444,677	24,359,280	24,423,225	24,323,967
Basic loss per share	$ (0.16)	$ (0.31)	$ (0.72)	$ (0.26)
Diluted loss per share	$ (0.16)	$ (0.31)	$ (0.72)	$ (0.26)