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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Accounts receivable, allowances $ 9,345 $ 7,855
Common stock, par value (usd per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 50,000,000 50,000,000
Common stock, shares issued (in shares) 21,256,793 20,764,143
Common stock, shares outstanding (in shares) 21,256,793 20,764,143
Preferred stock Series A    
Preferred stock, par value (usd per share) $ 1.00 $ 1.00
Preferred stock, shares authorized (in shares) 100 100
Preferred stock, issued (in shares) 0 0
Preferred stock, outstanding (in shares) 0 0
Preferred stock Series B    
Preferred stock, par value (usd per share) $ 1.00 $ 1.00
Preferred stock, shares authorized (in shares) 2,000,000 2,000,000
Preferred stock, issued (in shares) 0 0
Preferred stock, outstanding (in shares) 0 0