XML 31 R22.htm IDEA: XBRL DOCUMENT v3.23.1

Note D - Marketable Equity Securities (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Marketable Securities [Table Text Block]

		March 31, 2023				December 31, 2022
		(in thousands)
Fair market value		$	41,440			$	41,728
Cost			30,350				30,350
Unrealized gain		$	11,090			$	11,378

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

		March 31, 2023				December 31, 2022
		(in thousands)
Gross unrealized gains		$	13,206			$	13,478
Gross unrealized losses			2,116				2,100
Net unrealized gain		$	11,090			$	11,378

X

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

+ References

No definition available.

+ Details

Name:	us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_TableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of unrealized gains and losses on investments.

+ References

No definition available.

+ Details

Name:	us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration