Note 4 - Marketable Equity Securities (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Marketable Securities [Table Text Block]

	2021		2020
	(in thousands)
Available-for-sale securities:
Fair market value	$	39,424	$	27,941
Cost		29,385		25,860
Unrealized gain	$	10,039	$	2,081

Unrealized Gain (Loss) on Investments [Table Text Block]

	2021		2020
	(in thousands)
Available-for-sale securities:
Gross unrealized gains	$	12,458	$	7,048
Gross unrealized losses		2,419		4,967
Net unrealized gains	$	10,039	$	2,081

Schedule of Realized Gain (Loss) [Table Text Block]

	2021			2020			2019
	(in thousands)
Realized (losses) gains:
Sale proceeds	$	3,109		$	2,039		$	2,984
Cost of securities sold		3,199			2,216			1,929
Realized (losses) / gains	$	(90	)	$	(177	)	$	1,055