Earnings Per Common Share - Schedule of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Numerator: Net loss	$ (6,779)	$ (23,044)	$ (5,006)	$ (6,355)	$ (29,823)	$ (11,361)
Denominator:
Weighted average shares—basic (in shares)	15,761,000		15,704,000		15,757,000	15,627,000
Common stock equivalents (in shares)	0		0		0	0
Weighted average shares—diluted (in shares)	15,761,000		15,704,000		15,757,000	15,627,000
Loss per common share:
Net loss per basic common share (usd per share)	$ (0.43)		$ (0.32)		$ (1.89)	$ (0.73)
Net loss per diluted common share (usd per share)	$ (0.43)		$ (0.32)		$ (1.89)	$ (0.73)
Antidilutive stock-based awards excluded (in shares)	415,000		559,000		415,000	513,000