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Note 9 - Fair Value - Fair Values for Investments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Realized gains (losses)	$ 44,610,838	$ 5,701,048
Changes in fair values	48,613,962	10,399,932
Changes in fair values	(48,613,962)	(10,399,932)
Reported Value Measurement [Member]
Carrying amount	158,162,401	102,824,427
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Carrying amount	$ 158,162,401	$ 102,824,427

X

- Definition

Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(9)(a))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

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- Definition

Amount of realized gain (loss) on investment in debt and equity securities.

+ References

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- Definition

Cost of investment in debt investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

+ References

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