Note 3 - Other Revenues (Details Textual)	1 Months Ended	12 Months Ended
	Oct. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2010
Insurance Services Revenue, Total		$ 7,084,000	$ 8,003,000	$ 7,195,000
Number of Skilled Nursing Centers		9
Unbilled Receivables, Current		$ 21,398,000	21,384,000
Number of Assisted Living Facilities		4
Number of New Triple Net Lease Agreements Entered Into During the Period		11
Number of Health Care Properties Owned and Leased to Third Party Operators		13
Lessee, Operating Lease, Term of Contract		10 years			10 years
Proceeds from Sale of Productive Assets, Total	$ 4,300,000	$ 4,300,000
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		$ 1,668,000
Other Revenue [Member]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ 1,669,000
National [Member]
Number of Skilled Nursing Centers		5	5	5
Property Management Fee Revenue		$ 4,304,000	$ 4,194,000	$ 3,777,000
Management Services Provided to Other Facilities [Member]
Property Management Fee Revenue		$ 2,532,000	$ 2,794,000	$ 2,172,000
Number of Healthcare Facilities		7	7	6
Accounting and Financial Services Provided to Other Facilities [Member]
Number of Healthcare Facilities		20	20
Workers Compensation Revenue [Member]
Insurance Services Revenue, Total		$ 4,392,000	$ 5,300,000	$ 4,508,000
Professional Liability Insurance [Member]
Insurance Services Revenue, Total		$ 2,692,000	$ 2,703,000	$ 2,687,000