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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Accounts receivable, allowances $ 6,037 $ 6,190
Preferred stock, par value $ 1.00 $ 1.00
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 20,740,997 14,902,527
Common stock, shares outstanding 20,740,997 14,902,527
Preferred stock Series A    
Preferred stock, shares authorized 100 100
Preferred stock, issued 0 0
Preferred stock, outstanding 0 0
Preferred stock Series B    
Preferred stock, shares authorized 2,000,000 2,000,000
Preferred stock, issued 0 0
Preferred stock, outstanding 0 0