Business and Organization (Details)				12 Months Ended		15 Months Ended	33 Months Ended
	Nov. 10, 2016	Dec. 23, 2015 USD ($)	Mar. 28, 2014 USD ($) shares	Dec. 31, 2016 USD ($) employee $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Mar. 13, 2017 USD ($)	Dec. 31, 2016 USD ($) employee $ / shares shares	Oct. 26, 2016 USD ($) $ / shares	Feb. 09, 2015 USD ($) $ / shares
Class of Stock [Line Items]
Number of employees | employee				0			0
Common stock, shares authorized (shares) | shares				400,000,000			400,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.01			$ 0.01
Preferred stock, shares authorized (shares) | shares				50,000,000	50,000,000		50,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.01	$ 0.01		$ 0.01
Net proceeds from issuance of common stock				$ 7,697,289	$ 1,981,000
Offering extension period	1 year
Minimum
Class of Stock [Line Items]
Common stock declared effective to offer									$ 2,000,000
Maximum
Class of Stock [Line Items]
Common stock declared effective to offer									2,000,000,000
IPO
Class of Stock [Line Items]
Common stock declared effective to offer								$ 1,800,000,000	1,800,000,000
Sponsor of the Registrant
Class of Stock [Line Items]
Number of shares of common stock issued (shares) | shares			16,667
Co-Sponsor of the Registrant
Class of Stock [Line Items]
Number of shares of common stock issued (shares) | shares			5,556
Class A common
Class of Stock [Line Items]
Common stock, shares authorized (shares) | shares				120,000,000	120,000,000		120,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.01	$ 0.01		$ 0.01
Number of shares of common stock issued (shares) | shares				501,000	220,000		721,000
Net proceeds from issuance of common stock			$ 200,000	$ 5,007,000	$ 2,000,000		$ 7,007,000
Class A common | Distribution Reinvestment Plan
Class of Stock [Line Items]
Common stock declared effective to offer								$ 200,000,000	$ 200,000,000
Purchase price (in dollars per share) | $ / shares				$ 9.81			$ 9.81	$ 9.81	$ 9.81
Class A common | IPO
Class of Stock [Line Items]
Purchase price (in dollars per share) | $ / shares								10.1111	10.1111
Class A common | Sponsor of the Registrant
Class of Stock [Line Items]
Net proceeds from issuance of common stock		$ 1,500,000
Class A common | Co-Sponsor of the Registrant
Class of Stock [Line Items]
Net proceeds from issuance of common stock		$ 500,000
Class T common
Class of Stock [Line Items]
Common stock, shares authorized (shares) | shares				240,000,000	240,000,000		240,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.01	$ 0.01		$ 0.01
Number of shares of common stock issued (shares) | shares				296,000			296,000
Net proceeds from issuance of common stock				$ 2,831,000			$ 2,831,000
Class T common | Distribution Reinvestment Plan
Class of Stock [Line Items]
Purchase price (in dollars per share) | $ / shares				$ 9.27			$ 9.27	9.27	9.27
Class T common | IPO
Class of Stock [Line Items]
Purchase price (in dollars per share) | $ / shares								9.5538	$ 9.5538
Class I Common
Class of Stock [Line Items]
Common stock, shares authorized (shares) | shares				40,000,000	40,000,000		40,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.01	$ 0.01		$ 0.01
Number of shares of common stock issued (shares) | shares				74,000	0		74,000
Net proceeds from issuance of common stock				$ 669,000	$ 0		$ 669,000
Class I Common | Distribution Reinvestment Plan
Class of Stock [Line Items]
Purchase price (in dollars per share) | $ / shares				$ 9.10			$ 9.10	9.10
Class I Common | IPO
Class of Stock [Line Items]
Purchase price (in dollars per share) | $ / shares								$ 9.10
NorthStar/RXR NTR OP Holdings LLC
Class of Stock [Line Items]
Noncontrolling interests				$ 1,000
Subsequent Event | IPO
Class of Stock [Line Items]
Net proceeds from issuance of common stock						$ 13,900,000
Subsequent Event | Distribution Reinvestment Plan
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan						$ 10,522