Note 1 - Summary of Significant Accounting Policies (Details) - Cost and Carrying Value of Property and Equipment (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Cost	$ 61,197	$ 58,274
Accumulated Depreciation and Amortization	30,706	27,026
Carrying Value	30,491	31,248
Airplane [Member]
Property, Plant and Equipment [Line Items]
Cost	28,997	28,997
Accumulated Depreciation and Amortization	7,152	6,604
Carrying Value	21,845	22,393
Computer Software And Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	20,594	18,436
Accumulated Depreciation and Amortization	14,084	11,780
Carrying Value	6,510	6,656
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	9,617	8,793
Accumulated Depreciation and Amortization	7,590	6,787
Carrying Value	2,027	2,006
Other Capitalized Property Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	1,989	2,048
Accumulated Depreciation and Amortization	1,880	1,855
Carrying Value	$ 109	$ 193