Business Segment Data - Summary of Operations in Different Segments (Parenthetical) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Real Estate Operations (Contributed by Consolidated VIE)	$ 111,293,694	$ 74,334,247	$ 58,447,040
Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Real Estate Operations (Contributed by Consolidated VIE)	11,489,272
Real Estate Operations [Member] | Variable Interest Entity [Member]
Segment Reporting Information [Line Items]
Real Estate Operations (Contributed by Consolidated VIE)	$ 5,744,636