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

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

	Year Ended December 31,
	2020		2019		2018
	(Dollars in thousands)
Cash and cash equivalents	$	107,279	$	79,314	$	42,273
Restricted cash		180		117		269
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$	107,459	$	79,431	$	42,542