Debt - Additional Information (Detail)										1 Months Ended	9 Months Ended
		Oct. 28, 2022	Jan. 06, 2022 USD ($)	Nov. 09, 2021	Nov. 13, 2020 USD ($)	Feb. 27, 2020	Aug. 31, 2018 USD ($)	Feb. 23, 2018 USD ($) Property Loan	Jun. 28, 2017 USD ($)	May 31, 2021	Sep. 30, 2023 USD ($) Property Loan		Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Secured debt											$ 161,350,391			$ 162,815,965
Repayment of loan											$ 450,000		$ 17,000,000
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]
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.
Number of property-owning special purpose entities | Property								3
Number of mortgage loans | Loan								3			3
Debt instrument, interest payment period								2 years			2 years
Amortization period								30 years			30 years
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
KeyBank Bridge Loans [Member]
Debt Instrument [Line Items]
Loan maturity date				Apr. 30, 2023
Extension fee		0.35%
Freddie Mac Courtyard Loan [Member]
Debt Instrument [Line Items]
Secured debt							$ 63,200,000
Debt term							10 years
Loan maturity date	[2]										Sep. 01, 2028
Debt instrument, initial interest rate							4.86%				4.86%	[2]
Description of guarantees											We serve as non-recourse guarantor pursuant to the terms and conditions of the Freddie Mac Courtyard Loan. During the term of the Freddie Mac Courtyard 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 Courtyard Bridge Loans are paid in full, 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 all 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
Freddie Mac Courtyard 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
Freddie Mac Courtyard Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Non-recourse guaranty expiry threshold liquidity.							1,500,000
Courtyard Bridge Loans [Member]
Debt Instrument [Line Items]
Loan maturity date						Apr. 30, 2021					Apr. 30, 2020
Debt instrument, initial interest rate											9.42%
Debt instrument, description of variable rate											1-month SOFR plus 400 basis
Non-recourse guaranty expiry threshold liquidity.							$ 4,800,000
Commitment fee percentage on loan principal outstanding											0.50%
Debt instrument, repayment description											We were required to pay $1.0 million of the balance of the loan at signing of the Fifth Amendment, along with a fee equal to 0.50% of the then-outstanding principal balance of the loan. Beginning in May 2021, since the balance of the KeyBank Bridge Loans had not been reduced to $20 million, we were required to start paying a monthly fee of 0.05% of the loan balance above $20 million until such reduction is reached. Additionally, since the balance of the KeyBank Bridge Loans had not been reduced to $20 million by October 31, 2021, we were required to start making principal payments of $50,000 per month until such reduction is reached. Pursuant to the Fifth Amendment, we were also required to fund a reserve comprised of six months of interest payments, which may be utilized but must generally be replenished.
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
KeyBank Bridge Loans Amendment [Member]
Debt Instrument [Line Items]
Loan maturity date		Apr. 30, 2024			Apr. 30, 2022
Commitment fee percentage on loan principal outstanding					0.50%
Repayment of loan					$ 1,000,000
KeyBank Bridge Loans Amendment [Member] | If Balance of Loans not Reduced to $20 Million within Six Months of Closing Fifth Amendment [Member]
Debt Instrument [Line Items]
Monthly fee										0.05%
KeyBank Bridge Loans Amendment [Member] | Principal Amount Monthly Payment, If Balance of Loans not Reduced to $20 Million by October 1, 2021 [Member]
Debt Instrument [Line Items]
Repayment of loan					$ 50,000
KeyBank Bridge Loans Amendment [Member] | Minimum [Member]
Debt Instrument [Line Items]
EXR collateral ratio		1.2
Total collateral ratio		1
Courtyard Initial Bridge Loan [Member]
Debt Instrument [Line Items]
Loan maturity date	[3]										Apr. 30, 2024
Debt instrument, initial interest rate	[3]										9.42%
Debt instrument, initial loan amount											$ 27,000,000
Courtyard Delayed Draw Commitment [Member]
Debt Instrument [Line Items]
Repayment of loan			$ 12,000,000
Courtyard Delayed Draw Commitment [Member] | Maximum [Member]
Debt Instrument [Line Items]
Delayed draw commitment, amount											$ 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]
Loan prepayment period after written notice									30 days
Zero prepayment penalty period									90 days
Description of guarantees											We and H. Michael Schwartz, our Chairman of the Board and a director (our “Chairman”), serve as non-recourse guarantors pursuant to the terms and conditions of the JPM Mortgage Loan. The non-recourse guaranty of our Chairman 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.
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
Tallahassee Property [Member] | Freddie Mac Utah Loans [Member]
Debt Instrument [Line Items]
Reduction in liquidity requirement			$ 3,000,000

[1] Represents the aggregate of three separate mortgage loans for the three senior housing 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 beginning March 2020.

[2] Fixed rate debt with interest only payments due monthly for the first four years, then principal and interest on a 30-year amortization schedule beginning September 2022.

[3] The variable rate reflected in the table was the rate in effect as of September 30, 2023.

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