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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Notes receivable, allowance $ 623 $ 623
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) 14,002 13,997
Treasury stock, shares (in shares) 40 40