Note 18 - Fair Value Disclosure of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Nonrecurring [Member]
Other investments		$ 9,834
Fair Value, Nonrecurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Other investments		0
Fair Value, Nonrecurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Other investments		0
Fair Value, Nonrecurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Other investments		9,834
Fair Value, Recurring [Member]
Marketable equity securities	$ 597,732	1,211,739
Embedded Derivative, Fair Value of Embedded Derivative Liability	56,000
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Marketable equity securities	597,732	1,211,739
Embedded Derivative, Fair Value of Embedded Derivative Liability	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Marketable equity securities	0
Embedded Derivative, Fair Value of Embedded Derivative Liability	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Marketable equity securities	0	$ 0
Embedded Derivative, Fair Value of Embedded Derivative Liability	$ 56,000

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(4))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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