Earnings Per Share - Details of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income (loss)	$ (3,225)	$ 2,045
Denominator:
Weighted average shares outstanding – basic	43,368	39,482
Potential common shares – options / warrants (treasury stock method)		2,712
Weighted average shares outstanding – diluted	43,368	42,194
Shares excluded (anti-dilutive)	2,559	77
Net earnings (loss) per common share:
Basic	$ (0.07)	$ 0.05
Diluted	$ (0.07)	$ 0.05