Note 4 - Fair Value Measurements - Financial Assets Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Inputs, Level 1 [Member] \| Money Market Funds [Member]
Money market funds	$ 151,231	$ 1,600,663
Fair Value, Inputs, Level 3 [Member]
Fair value of contingent consideration	942,609	930,000
December 31, 2021	942,609	930,000
Change in fair value	12,609
Fair Value, Inputs, Level 3 [Member] \| Money Market Funds [Member]
Money market funds	$ 151,231	$ 1,660,663

Change in fair value of contingent consideration asset in a business combination.

No definition available.

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- Definition

Fair value of contingent consideration asset in a business combination.

+ References

No definition available.

+ Details

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- 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
-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

+ Details

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- 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.

+ Details

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