Summary of Significant Accounting Policies - Narrative (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) facility segment	Sep. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Accounting Policies [Abstract]
Number of independent living facilities operated | facility				3
Accumulated amortization of deferred financing costs	$ 2,700,000	$ 2,700,000		$ 2,700,000			$ 4,200,000
Contractual cash rent reserves	500,000	500,000		500,000			0
Stock-based compensation expense		700,000	$ 300,000	$ 1,792,000	$ 1,207,000
Number of reportable segments | segment				1
Restricted cash	0	0		$ 0			$ 0
Other Commitments [Line Items]
Increase in deferred rent receivable	800,000
Pristine Master Lease
Other Commitments [Line Items]
Prefunded Balance In Impound Account						$ 3,000,000
Receivable for deferred rent and franchise permit fees	5,300,000	5,300,000		5,300,000
Increase in deferred rent receivable	800,000
Lease Agreements
Other Commitments [Line Items]
Remaining contractual payments as lessee	$ 300,000	$ 300,000		300,000
Independent Living Facilities
Other Commitments [Line Items]
Revenue				$ 2,407,000