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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Current assets:    
Accounts receivable allowance $ 3,252 $ 3,561
STOCKHOLDERS’ EQUITY    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, authorized (in shares) 5,000,000 5,000,000
Preferred stock, issued (in shares) 0 0
Preferred stock, outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized (in shares) 50,000,000 50,000,000
Common stock, issued (in shares) 23,117,000 23,117,000
Common stock, outstanding (in shares) 22,858,000 22,857,000
Treasury stock (in shares) 259,000 260,000