Note 17 - Equity Method Investment in Caris HealthCare, L.P. - Summary of Financial Information of Caris (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current assets	$ 17,539	$ 24,582	$ 23,174
Noncurrent assets	10,266	10,490	10,673
Liabilities	8,657	10,113	9,118
Partners’ capital	19,148	24,959	24,729
Revenue	56,410	53,586	53,211
Expenses	55,507	46,436	44,091
Net income	$ 903	$ 7,150	$ 9,120