Note 6 - Common Stock (Details Textual) - $ / shares $ / shares in Thousands	Mar. 31, 2022	Dec. 31, 2021
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	86,522,569
Common Stock, Shares Held in Escrow (in shares)		5,175,000