Note 4 - Investment in Equity Securities (Details Textual) $ in Millions	Dec. 23, 2022 USD ($)
Dynamic Cell Therapies, Inc. [Member]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	19.00%
Dynamic Cell Therapies, Inc. [Member]
Payments to Acquire Equity Securities without Readily Determinable Fair Value	$ 4.7

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481203/810-10-50-5A

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration