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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
$ / shares in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Preferred stock, no par value (in dollars per share) $ 0 $ 0
Preferred stock, shares outstanding (in shares) 0 0
Preferred stock, shares authorized Unlimited Unlimited
Common stock, no par value (in dollars per share) $ 0 $ 0
Common stock, shares authorized Unlimited Unlimited
Common stock, shares outstanding (in shares) 30,439,275 30,439,275