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Acquisitions and Dispositions - Summary of Pro forma Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]
Net revenue	$ 62,750,125	$ 119,848,124
Operating income	10,152,616	15,705,941
Net income	$ 3,208,535	$ 3,782,447
Basic and diluted net income per share	$ 0.12	$ 0.14

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Business Acquisition Pro Forma Earnings Per Share Basic And Diluted

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Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]

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Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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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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-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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