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Consolidated Balance Sheets (Parentheticals) - $ / shares
$ / shares in Thousands
Dec. 31, 2021
Dec. 31, 2020
Preferred stock, authorized (in shares) 100,000 100,000
Preferred stock, outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0 $ 0
Common stock, authorized (in shares) 12,000,000 12,000,000
Common stock, outstanding (in shares) 7,510,379 7,796,352