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Note 2 - Fair Value of Financial Instruments - Financial Instruments (Details) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Total	$ 8,386,252	$ 8,152,810
Estimate of Fair Value Measurement [Member]
Total	8,386,252	8,148,126
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Cash and Cash Equivalents Excluding Certificates of Deposit [Member]
Cash and cash equivalents	8,386,252	7,148,207
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member] | Certificates of Deposit [Member]
Cash and cash equivalents	0	1,004,603
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Cash and Cash Equivalents Excluding Certificates of Deposit [Member]
Cash and cash equivalents	8,386,252	7,148,207
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Certificates of Deposit [Member]
Cash and cash equivalents	$ 0	$ 999,919

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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X

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

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