Note 1 - Nature of Operations, Basis of Presentation and Consolidation (Details Textual)	3 Months Ended
	Mar. 31, 2023 USD ($) shares
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares	169,690
UNITED STATES
Cash, Uninsured Amount	$ 803,000
HONG KONG
Cash, Uninsured Amount	1,800,000
CHINA
Restricted Cash	$ 4,100,000