Note 1 - Description of Business and Basis of Presentation (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Goodwill and Intangible Asset Impairment, Total	$ 0
Retained Earnings (Accumulated Deficit), Ending Balance	$ 1,126,174		$ 1,084,383
Accounting Standards Update 2016-13 [Member]
Retained Earnings (Accumulated Deficit), Ending Balance		$ (1,147)