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Nature of Business and Summary of Significant Accounting Policies - Schedule of Numerators and Denominators Used to Calculate Basic and Diluted Earnings Per Share (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator (for basic and diluted earnings per share)
Net income (loss)	$ 17,707	$ (7,121)	$ (3,029)
Denominator
Basic	34,987,878	34,714,395	34,445,256
Common stock equivalents arising from stock options and restricted stock awards	496,000
Diluted weighted-average shares outstanding	35,484,273	34,714,395	34,445,256

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