Earnings Per Share - Schedule of Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic earnings per share:
Net income (loss)	$ 358	$ (3,580)
Shares used in computation:
Weighted-average common stock outstanding	19,201	18,482
Basic earnings per share	$ 0.02	$ (0.19)
Diluted earnings per share:
Net income (loss)	$ 358	$ (3,580)
Weighted-average shares outstanding:
Weighted-average common stock outstanding	19,201	18,482
Common stock equivalents	523
Weighted-average number of shares	19,724	18,482
Diluted earnings per share	$ 0.02	$ (0.19)