Note 1 - Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

Three months ended March 31,	2020			2019
Cash, cash equivalents and restricted cash, beginning of period	$	268,108		$	278,629
End of the period
Cash and cash equivalents		242,604			200,263
Restricted cash		4,881			5,825
Total cash, cash equivalents and restricted cash, end of period		247,485			206,088
Net decrease in cash, cash equivalents and restricted cash	$	(20,623	)	$	(72,541	)