Note 8 - Long-term Leases (Details Textual)	3 Months Ended	6 Months Ended	9 Months Ended
	Jun. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Two Leases with NHI [Member]
Number of Skilled Nursing Centers Leased from NHI			35
Number of Assisted Living Centers Leased from NHI			7
Number of Independent Living Centers Leased from NHI			3
Number of Lease Agreements with NHI			2
Lessee, Operating Lease, Annual Base Rent Expense			$ 34,200,000
Lessee, Operating Lease Additional Percentage Rent Percentage			4.00%
Operating Lease, Expense	$ 9,655,000	$ 9,515,000	$ 28,965,000	$ 28,545,000
Lease One With NHI [Member]
Number of Skilled Nursing Facilities Subleased			4
Senior Healthcare Facilities [Member]
Number of Facilities under Finance Leases			3
Number of Finance Lease Agreements			3
Lessee, Finance Lease, Term of Contract (Year)			10 years
Number of Additional Lease Options			2
Lessee, Finance Lease, Annual Base Rent Expense			$ 5,200,000
Lessee, Finance Lease Additional Percentage Rent Percentage			4.00%
Lessee, Finance Lease, Renewal Term (Year)			5 years