Real Estate Assets Owned - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) Property	Dec. 31, 2015 USD ($) Property
Real Estate [Abstract]
Real estate assets owned	$ 734,727	$ 285,341
Number of units in real estate assets owned | Property	15	11
Number of units, net of disposals in real estate assets owned capitalized | Property	4	9
Real estate assets owned capitalized at fair value less cost for disposal	$ 57,000	$ 237,000
Real estate portfolio, number of units | Property	67	43
Number of units sold | Property	4	1
Proceeds from sale of units	$ 105,000	$ 10,000
Gain or loss on disposal of real estate assets	0	0
Rental revenues	347,040	180,157
Net of cost recovery	128,000
Monthly contingent obligation for assessments due to associations	$ 23,000	$ 15,000