Acquisitions - Summary of Unaudited Proforma Results of Operation (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition Pro Forma Information [Abstract]
Revenues	$ 10,854	$ 7,717	$ 19,286	$ 14,232
Net income (loss)	$ 3,436	$ (2,052)	$ 3,484	$ (4,084)
Earnings (loss) per share:
Basic	$ 0.11	$ (0.10)	$ 0.11	$ (0.20)
Diluted	$ 0.10	$ (0.10)	$ 0.10	$ (0.20)

Pro forma basic earnings per share or earnings per unit, which is commonly presented in initial public offerings based on the terms of the offering.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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Pro forma diluted earnings per share, which is commonly presented in initial public offerings.

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