Subsequent Events - Common Stock from Primary Offering (Details) - USD ($)		2 Months Ended	12 Months Ended		33 Months Ended
	Mar. 28, 2014	Mar. 13, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016
Subsequent Event [Line Items]
Common stock offering			$ 7,697,289	$ 1,981,000
Class A
Subsequent Event [Line Items]
Number of shares of common stock issued (shares)			501,000	220,000	721,000
Common stock offering	$ 200,000		$ 5,007,000	$ 2,000,000	$ 7,007,000
Class T
Subsequent Event [Line Items]
Number of shares of common stock issued (shares)			296,000		296,000
Common stock offering			$ 2,831,000		$ 2,831,000
Class I
Subsequent Event [Line Items]
Number of shares of common stock issued (shares)			74,000	0	74,000
Common stock offering			$ 669,000	$ 0	$ 669,000
Subsequent Event | Class A | Primary Offering
Subsequent Event [Line Items]
Number of shares of common stock issued (shares)		178,735
Common stock offering		$ 1,800,000
Subsequent Event | Class T | Primary Offering
Subsequent Event [Line Items]
Number of shares of common stock issued (shares)		158,461
Common stock offering		$ 1,500,000
Subsequent Event | Class I | Primary Offering
Subsequent Event [Line Items]
Number of shares of common stock issued (shares)		6,703
Common stock offering		$ 60,000