Note 1 - Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

	Year Ended December 31,
	2019		2018		2017
	(Dollars in thousands)
Cash and cash equivalents	$	79,314	$	42,273	$	123,546
Restricted cash		117		269		424
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$	79,431	$	42,542	$	123,970