CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Issuance and amortization of equity-based compensation	$ 46
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0	0
Preferred stock, shares outstanding (in shares)	0	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000.0	400,000,000.0	400,000,000
Common stock, shares issued (in shares)	189,181,904	189,181,904	188,495,355
Common stock, shares outstanding (in shares)	189,181,904	189,181,904	188,495,355
Primary Beneficiary
Ownership interest in operating partnership (percentage)		99.99%
Northstar Healthcare Income Operating Partnership, LP | Primary Beneficiary
Ownership interest in operating partnership (percentage)		99.99%
Assets of consolidated VIEs	$ 600,000	$ 600,000
Liabilities of consolidated VIEs	$ 500,000	$ 500,000