CONSOLIDATED BALANCE SHEETS (Parentheticals) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	50,000,000	50,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (shares)	400,000,000
Class A common
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	120,000,000	120,000,000
Common stock, shares issued (shares)	765,723	242,003
Common stock, shares outstanding (shares)	765,723	242,003
Class T common
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	240,000,000	240,000,000
Common stock, shares issued (shares)	296,314	0
Common stock, shares outstanding (shares)	296,314	0
Class I
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	40,000,000	40,000,000
Common stock, shares issued (shares)	73,524	0
Common stock, shares outstanding (shares)	73,524	0