Note 2 - Summary of Significant Accounting Policies (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Accounts Receivable, Credit Loss Expense (Reversal)	$ 1,668,000	$ 1,685,000	$ 5,331,000	$ 6,026,000
Accounts Receivable, Allowance for Credit Loss	8,598,000		$ 8,598,000		$ 6,246,000
Number of Reportable Segments			2
General and Administrative Expense	5,661,000	$ 6,050,000	$ 16,309,000	$ 16,636,000
Continuing Care Retirement Communities, Refund Obligation	$ 2,218,000		$ 2,218,000		$ 2,218,000
Refundable Advance Fees [Member]
Nonrefundable Resident Entry Fee Percentage			10.00%
Original Entry Fee [Member]
Refundable Resident Entry Fee Percentage			90.00%
Appreciation [Member]
Appreciation of Apartment Over Original Residents Entry Fee Percentage			40.00%
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)	2 years		2 years
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	20 years		20 years
Minimum [Member] | Equipment and Furniture [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years		3 years
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	15 years		15 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	40 years		40 years
Maximum [Member] | Equipment and Furniture [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years		15 years