Note 16 - Equity Method Investment in Caris HealthCare, L.P. (Details) - Summary of Financial Information of Caris (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of Financial Information of Caris [Abstract]
Current assets	$ 20,922	$ 25,212	$ 30,731
Noncurrent assets	11,540	11,685	9,051
Liabilities	7,305	8,879	9,365
Partners’ capital	25,157	28,018	30,417
Revenue	51,441	58,918	59,422
Expenses	40,908	40,112	40,341
Net income	$ 10,533	$ 18,806	$ 19,081