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CONDENSED CONSOLIDATED BALANCE SHEETS [Parenthetical] - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Accounts receivable, net of allowance for doubtful accounts $ 900 $ 1,000
Serial preferred stock, shares authorized 5,000,000 5,000,000
Serial preferred stock, outstanding 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 75,000,000 75,000,000
Common stock, shares issued 27,633,000 27,558,000
Common stock, shares outstanding 25,952,000 25,877,000
Treasury stock, shares 1,681,000 1,681,000