Note 1 - Business and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Table Text Block]

(in thousands)	March 31, 2019		December 31, 2018
Cash and cash equivalents	$	189,518	$	192,844
Restricted cash, non-current		100		100
Total cash, cash equivalents, and restricted cash	$	189,618	$	192,944