Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Income Taxes [Line Items]
Effective income tax rate including income taxes attributable to the discontinued operations				43.70%	39.40%
Stock-based compensation expense				$ (83,000)
Income tax benefit related to stock compensation expense	$ 155,059		$ 281,147	1,116,202	$ 520,977
Restricted Shares [Member]
Income Taxes [Line Items]
Number of common stock shares permanently surrendered		68,000
Total stock compensation expense		$ 2,300,000
Stock-based compensation expense		1,600,000		$ 1,600,000		$ 676,000
Income tax benefit related to stock compensation expense		$ 0