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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, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator (for basic and diluted earnings per share)
Net loss	$ (7,121)	$ (3,029)	$ (38,218)
Denominator
Basic	34,714,395	34,445,256	33,979,549
Diluted	34,714,395	34,445,256	33,979,549

X

- Definition

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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