Note 2 - Significant Accounting Policies and Recent Accounting Pronouncements (Tables)

12 Months Ended

Dec. 31, 2023

Significant Accounting Policies and Recent Accounting Pronouncements [Abstract]

Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Table Text Block]

	For the years ended December 31,
	2021		2022		2023
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents	$	276,002	$	718,049	$	745,544
Restricted cash – current portion		8,856		9,768		10,645
Restricted cash – non-current portion		68,670		83,741		69,015
Total cash, cash equivalents and restricted cash	$	353,528	$	811,558	$	825,204

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	2021			2022			2023
A		16	%		13	%		10	%
B		20	%		18	%		9	%
C		12	%		7	%		5	%
D		12	%		8	%		6	%
E		5	%		8	%		12	%
Total		65	%		54	%		42	%