Business Segment Data - Summary of Operations in Different Segments (Parenthetical) (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Real Estate Operations (Contributed by Consolidated VIE)	$ 51,605,489	$ 15,952,004	$ 62,634,148	$ 49,283,362
Real Estate Operations [Member]
Segment Reporting Information [Line Items]
Real Estate Operations (Contributed by Consolidated VIE)	11,489,272		11,489,272
Real Estate Operations [Member] | Variable Interest Entity [Member]
Segment Reporting Information [Line Items]
Real Estate Operations (Contributed by Consolidated VIE)	$ 5,664,787		$ 5,664,787