Note 3 - Other Revenues (Details Textual)	1 Months Ended	12 Months Ended
	Oct. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Insurance Services Revenue, Total		$ 6,209,000	$ 7,084,000	$ 8,003,000
Proceeds from Sale of Productive Assets, Total	$ 4,300,000	0	4,300,000	0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		$ (0)	1,668,000	(0)
Other Revenue [Member]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ 1,668,000
National [Member]
Number of Skilled Nursing Centers		5
Property Management Fee Revenue		$ 6,627,000	4,304,000	4,194,000
Unbilled Receivables, Current		19,148,000	21,398,000
Management Services Provided to Other Facilities [Member]
Property Management Fee Revenue		$ 2,952,000	$ 2,532,000	2,794,000
Accounting and Financial Services Provided to Other Facilities [Member]
Number of Healthcare Facilities		20	20
Workers Compensation Revenue [Member]
Insurance Services Revenue, Total		$ 3,536,000	$ 4,392,000	5,300,000
Professional Liability Insurance [Member]
Insurance Services Revenue, Total		$ 2,673,000	$ 2,692,000	$ 2,703,000