Note 1 - Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

Six months ended June 30,	2020		2019
Cash, cash equivalents and restricted cash, beginning of period	$	268,108	$	278,629
End of the period
Cash and cash equivalents		288,922		144,958
Restricted cash		1,512		5,825
Total cash, cash equivalents and restricted cash, end of period		290,434		150,783
Net increase (decrease) in cash, cash equivalents and restricted cash	$	22,326	$	(127,846	)