Note 5 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property and equipment, gross	$ 270,338	$ 277,071
Less: accumulated depreciation and amortization	(175,903)	(178,490)
Property and equipment, net	94,435	98,581
Depreciation and amortization expenses related to property and equipment	33,254	27,515	$ 24,882
Equipment [Member]
Property and equipment, gross	95,350	106,768
Leasehold Improvements [Member]
Property and equipment, gross	7,547	8,357
Building [Member]
Property and equipment, gross	8,624	8,624
Building Improvements [Member]
Property and equipment, gross	14,825	14,546
Land [Member]
Property and equipment, gross	2,769	2,769
Furniture and Fixtures [Member]
Property and equipment, gross	9,404	10,352
Software and Software Development Costs [Member]
Property and equipment, gross	$ 131,819	$ 125,655

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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