Debt - Additional Information (Detail)						3 Months Ended				9 Months Ended
		Aug. 31, 2018 USD ($)	Feb. 23, 2018 USD ($) Property Loan	Sep. 28, 2017 USD ($)	Jun. 28, 2017 USD ($)	Sep. 30, 2018 USD ($) Loan		Mar. 31, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Property Loan		Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Secured debt						$ 202,111,681				$ 202,111,681			$ 52,299,638
Carrying Value						204,456,864				204,456,864
Proceeds from asset management fees						$ 5,990,993			$ 1,324,885	$ 14,912,362		$ 1,379,330
Key Bank [Member] | Acquisition Fees [Member]
Debt Instrument [Line Items]
Proceeds from asset management fees								$ 1,200,000
Nationwide Loan [Member]
Debt Instrument [Line Items]
Secured debt				$ 23,500,000
Loan maturity date				Oct. 01, 2024
Debt instrument, initial interest rate				3.84%
Loan prepayment period after written notice				30 days
Zero prepayment penalty period				6 months
Description of guarantees										We and an entity controlled by our CEO originally served as non-recourse guarantors pursuant to the terms and conditions of the Nationwide Loan. The non-recourse guaranty of the entity controlled by our CEO expired as of April 2018
Freddie Mac Utah Loans [Member]
Debt Instrument [Line Items]
Secured debt			$ 46,900,000
Debt term			10 years
Loan maturity date	[1]									Feb. 23, 2028
Debt instrument, initial interest rate			5.06%			5.06%	[1]			5.06%	[1]
Description of guarantees										We serve as non-recourse guarantors pursuant to the terms and conditions of the Freddie Mac Utah Loans. During the term of the Freddie Mac Utah Loans, we are required to maintain a net worth equal to or greater than $15 million and an initial liquidity requirement equal to or greater than $4.8 million. Once the Utah Bridge Loan (defined below) is paid in full, the liquidity requirement will be reduced to $3 million.
Number of property-owning special purpose entities | Property			3
Number of mortgage loans | Loan			3			3				3
Debt instrument, interest payment period			2 years							2 years
Amortization period			30 years							30 years
Carrying Value	[1]					$ 46,905,000				$ 46,905,000
Freddie Mac Utah Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Non-recourse guaranty expiry threshold net worth			$ 15,000,000
Non-recourse guaranty expiry threshold liquidity.			4,800,000
Utah Bridge Loan [Member]
Debt Instrument [Line Items]
Secured debt			24,500,000
Loan maturity date	[2]									Feb. 23, 2019
Debt instrument, initial interest rate	[2]					6.22%				6.22%
Debt instrument, description of variable rate										1-month Libor plus 400 basis points
Debt instrument, variable interest rate										4.00%
Carrying Value	[2]					$ 14,351,864				$ 14,351,864
Loan maturity conditional maturity date										Aug. 23, 2019
Commitment fee percentage on loan principal outstanding										0.50%
Percentage of net proceeds from certain capital events required to be applied										100.00%
Utah Bridge Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Non-recourse guaranty expiry threshold liquidity.			$ 3,000,000
Portland Freddie Mac Mortgage Loan [Member]
Debt Instrument [Line Items]
Secured debt		$ 63,200,000
Debt term		10 years
Loan maturity date	[3]									Sep. 01, 2028
Debt instrument, initial interest rate		4.86%				4.86%	[3]			4.86%	[3]
Description of guarantees										We serve as non-recourse guarantors pursuant to the terms and conditions of the Freddie Mac Portland Loan. During the term of the Freddie Mac Portland Loan, we are required to maintain a net worth equal to or greater than $18.96 million and an initial liquidity requirement equal to or greater than $6.32 million. Once the Portland Bridge Loans are paid in full and the Memory Care Expansion (each defined further below) is complete, the liquidity requirement will be reduced to $4.8 million. We are able to reduce each of the foregoing liquidity requirements by an additional amount equal to the amount of the 12-month trailing cash flows of our properties, up to a maximum reduction of $1.5 million.
Debt instrument, interest payment period		4 years								4 years
Amortization period		30 years								30 years
Carrying Value	[3]					$ 63,200,000				$ 63,200,000
Portland Freddie Mac Mortgage Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Non-recourse guaranty expiry threshold net worth		$ 18,960,000
Non-recourse guaranty expiry threshold liquidity.		6,320,000
Portland Freddie Mac Mortgage Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Non-recourse guaranty expiry threshold liquidity.		1,500,000
Portland Bridge Loan [Member]
Debt Instrument [Line Items]
Loan maturity date										Aug. 31, 2019
Debt instrument, initial interest rate						6.25%				6.25%
Non-recourse guaranty expiry threshold liquidity.		$ 4,800,000
Carrying Value						$ 27,000,000				$ 27,000,000
Loan maturity conditional maturity date										Apr. 30, 2020
Commitment fee percentage on loan principal outstanding										0.50%
Percentage of net proceeds from certain capital events required to be applied										100.00%
Number of memory care units expected to be completed in property acquisition | Property										23
Fayetteville Bridge Loan [Member]
Debt Instrument [Line Items]
Secured debt					$ 22,300,000
Debt instrument, initial interest rate					5.23%
Debt instrument, description of variable rate										1-month Libor plus 400 basis points
Debt instrument, variable interest rate					4.00%
Tallahassee Bridge Loan [Member]
Debt Instrument [Line Items]
Secured debt				$ 17,600,000
Debt instrument, initial interest rate				5.24%
Debt instrument, description of variable rate										1-month Libor plus 400 basis points
Debt instrument, variable interest rate				4.00%
Portland Delayed Draw Commitment [Member]
Debt Instrument [Line Items]
Carrying Value						0				$ 0
Unused commitment fee percentage										0.35%
Portland Delayed Draw Commitment [Member] | Maximum [Member]
Debt Instrument [Line Items]
Delayed draw commitment, amount						$ 14,000,000				$ 14,000,000
Fayetteville Property [Member] | JPM Mortgage Loan [Member]
Debt Instrument [Line Items]
Secured debt					$ 29,500,000
Debt term					7 years
Loan maturity date					Jul. 01, 2024					Jul. 01, 2024	[4]
Debt instrument, initial interest rate					4.20%	4.20%	[4]			4.20%	[4]
Loan prepayment period after written notice					30 days
Zero prepayment penalty period					90 days
Description of guarantees										We and H. Michael Schwartz, our Chief Executive Officer (our “CEO”), serve as non-recourse guarantors pursuant to the terms and conditions of the JPM Mortgage Loan. The non-recourse guaranty of our CEO will expire, upon request, and be of no further force and effect at such time as we have: (1) a net worth (as defined in the agreement) equal to or greater than $40 million; and (2) liquidity (as defined in the agreement) equal to or greater than $3 million.
Carrying Value	[4]					$ 29,500,000				$ 29,500,000			$ 29,500,000
Fayetteville Property [Member] | JPM Mortgage Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Non-recourse guaranty expiry threshold net worth					$ 40,000,000
Non-recourse guaranty expiry threshold liquidity.					$ 3,000,000

[1] Represents the aggregate of three separate mortgage loans for three properties acquired in Utah. Fixed rate debt with interest only payments due monthly for the first two years, then principal and interest on a 30-year amortization schedule thereafter.

[2] Variable rate debt with interest only payments due monthly. The variable rate reflected in the table was the rate in effect as of September 30, 2018. The loan may be extended six months from the maturity date upon the payment of a fee equal to 0.50% of the outstanding principal balance of the loan at the time of such extension and certain other terms are met, such as there has not been an event of default.

[3] Fixed rate debt with interest only payments due monthly for the first four years, then principal and interest on a 30-year amortization schedule thereafter.

[4] Fixed rate debt with interest only payments due monthly and the principal balance due upon maturity.