Note 13 - Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	March 31, 2022
	Carrying Value		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	48,610	$	48,610	$	48,610	$	-	$	-
Restricted cash		18,036		18,036		18,036		-		-
Restricted investments		166,560		165,526		165,526		-		-
	$	233,206	$	232,172	$	232,172	$	-	$	-
Liabilities
Bonds payable	$	160,756	$	161,892	$	-	$	161,892	$	-
Warrants liability		21,924		21,924		10,267		11,657		-
	$	182,680	$	183,816	$	10,267	$	173,549	$	-

	December 31, 2021
	Carrying Value		Fair Value		Level 1		Level 2		Level 3
Assets
Cash and cash equivalents	$	6,805	$	6,805	$	6,805	$	-	$	-
Restricted cash		197,130		197,130		197,130		-		-
Restricted investments		-		-		-		-		-
	$	203,935	$	203,935	$	203,935	$	-	$	-
Liabilities
Bonds payable	$	160,679	$	173,093	$	-	$	173,093	$	-
Warrants liability		-		-		-		-		-
	$	160,679	$	173,093	$	-	$	173,093	$	-