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Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares
shares in Thousands
Sep. 30, 2023
Dec. 31, 2022
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 1,000 1,000
Preferred stock, shares issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 30,000 30,000
Common stock, shares issued (in shares) 13,982 13,918
Treasury stock, shares (in shares) 40 40