Note 5 - Notes Receivable (Details Textual) - USD ($)	May 27, 2020	Dec. 31, 2019
Other Capitalized Property Plant and Equipment [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total	$ 1,492,500
Asset Purchase Agreement with InventaBiotech and Its Subsidiaries, Soluble and BioDeth [Member]
Stock Issued During Period, Shares, Purchase of Assets (in shares)	125,000
Other Nonoperating Income	$ 1,290,000
CytoBioscience [Member] \| Promissory Notes Receivable [Member]
Financing Receivable, after Allowance for Credit Loss, Total		$ 1,112,524
Notes Receivable, Interest Rate, Stated Percentage		8.00%
Financing Receivable, Allowance for Credit Loss, Ending Balance		$ 1,037,524

Represents the simple interest rate for notes receivable.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of income related to nonoperating activities, classified as other.

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Number of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

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