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Note 9 - Fair Value - Fair Values for Investments (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($)
Realized gains and (losses) | $ 5,688,750
Marketable equity securities, U.S. Treasury trading securities, and corporate bonds | (10,402,013)
Reported Value Measurement [Member] |
Marketable equity securities, securities available for sale and corporate bonds | 102,824,427
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |
Marketable equity securities, securities available for sale and corporate bonds | $ 102,824,427

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- 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=120395209&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=120395209&loc=SL114868664-224227 + Details
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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 No definition available. + Details
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