Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

	March 31,		March 31,
	2021		2020
Cash and cash equivalents	$	35,711	$	8,003
Restricted cash included in current assets		150		2,771
Restricted cash included in long-term assets		270		362
Total cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows	$	36,131	$	11,136