Income (Loss) Per Share and Per Unit - Computation of Basic and Diluted Income (Loss) Per Share (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator
Net income (loss) attributable to the Company for basic computation									$ 5,356,666	$ (584,671)	$ (3,483,969)
Denominator
Weighted average number of common shares outstanding for basic computation									12,541,117	10,377,125	10,156,955
Basic and diluted net income (loss) per share	$ (0.04)	$ 0.27	$ 0.13	$ 0.05	$ (0.31)	$ (0.02)	$ 0.21	$ 0.08	$ 0.43	$ (0.06)	$ (0.34)