Earnings per Share - Number of Shares Outstanding for Calculation of Earnings Per Share (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Numerator (for basic and diluted earnings (loss) per share)
Net income	$ 3,412	$ 1,864
Denominator
Basic weighted-average shares outstanding	35,155,377	34,835,550
Common stock equivalents arising from stock options and restricted stock awards	240,000	524,000
Diluted weighted-average shares outstanding	35,394,865	35,360,042

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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