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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Statement Of Financial Position [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 650 $ 1,894
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 75,000 75,000
Common stock, shares issued 39,619 39,205
Common stock, shares outstanding 39,619 39,205
Preferred stock, shares authorized 500 500
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0