Note 18 - Equity Method Investment in Caris HealthCare, L.P. - Summary of Financial Information of Caris (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current assets	$ 456,755	$ 341,053
Liabilities	563,872	507,579
Partners’ capital	795,177	778,593
Revenue	1,028,217	996,383	$ 980,349
Expenses	980,062	947,345	924,273
Net income	41,990	67,976	58,699
Caris [Member]
Current assets	27,737	25,664	17,539
Noncurrent assets	12,083	12,336	10,266
Liabilities	9,825	10,784	8,657
Partners’ capital	29,995	27,216	19,148
Revenue	68,649	62,034	56,410
Expenses	52,522	48,803	55,507
Net income	$ 16,127	$ 13,231	$ 903