Note 6 - Common Stock (Details Textual) - $ / shares $ / shares in Thousands	Mar. 31, 2023	Dec. 31, 2022
Common Stock, No Par Value (in dollars per share)	$ 0	$ 0
Common Stock, Shares Authorized (in shares)	500,000,000	500,000,000
Common Stock, Shares, Outstanding, Ending Balance (in shares)	91,422,569	91,422,569
Preferred Stock, Shares Authorized (in shares)	250,000,000	250,000,000
Preferred Stock, Shares Issued (in shares)	0	0
Common Stock, Shares Held in Escrow (in shares)	1,875,000