Note 2 - Net Patient Revenues (Details Textual) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 4,451,000	$ 4,610,000
Medicare and Medicaid [Member]
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 15,108,000	$ 16,108,000