Investment Properties - Reconciliation of Investment Properties Owned (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Investments Schedule [Abstract]
Balance at January 1,	$ 4,122,424	$ 11,063,438	$ 11,063,438
Additions during period	0		1,289
Provision for loss on investment property held for sale	0	(320,937)	(585,937)
Impairment loss on land	0	$ (2,680,000)	(2,680,000)
Investment property held for sale	0		(3,676,366)
Balance at end of period,	$ 4,122,424		$ 4,122,424