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, 2019	Dec. 31, 2018	Dec. 31, 2017
Current assets	$ 25,664	$ 17,539	$ 24,582
Noncurrent assets	12,336	10,266	10,490
Liabilities	10,784	8,657	10,113
Partners’ capital	27,216	19,148	24,959
Revenue	62,034	56,410	53,586
Expenses	48,803	55,507	46,436
Net income	$ 13,231	$ 903	$ 7,150