Note 9 - Estimated Liability for Appeals - Activity in Estimated Liability for Appeals (Details) - USD ($)	3 Months Ended	6 Months Ended
	Mar. 31, 2018	Jun. 30, 2018	Jun. 30, 2017
Release of liability	$ (8,400,000)	$ (8,436,000)
Estimated Liability for Appeals and Estimated Allowance for Appeals [Member]
Balance--beginning of period	$ 8,544,000	8,544,000
Provision
Appeals found in providers favor		(108,000)
Release of liability		(8,436,000)
Balance--end of period