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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Allowance for doubtful accounts $ 541 $ 486
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 1,000,000 1,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 20,000,000 20,000,000
Common stock, shares issued (in shares) 7,512,403 7,475,768
Common stock, shares outstanding (in shares) 7,482,844 7,446,209
Treasury stock, shares (in shares) 29,559 29,559