Note 1 - Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Schedule of Cash and Cash Equivalents [Table Text Block]

Six months ended June 30,	2021			2020
Cash, cash equivalents and restricted cash, beginning of period	$	437,648		$	268,108
End of the period
Cash and cash equivalents		393,181			288,922
Restricted cash		1,512			1,512
Total cash, cash equivalents and restricted cash, end of period		394,693			290,434
Net (decrease) increase in cash, cash equivalents and restricted cash	$	(42,955	)	$	22,326