Note 5 - Property and Equipment, Net (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Depreciation, Total	$ 22,399	$ 20,227	$ 20,631
Capitalized Computer Software, Gross	7,339	6,879
Capitalized Computer Software, Amortization	384	591	$ 1,038
Capital Expenditures Incurred but Not yet Paid	$ 4,728	$ 2,580