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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Accounts receivable, allowance for doubtful accounts $ 3,586 $ 2,449
Property and equipment, accumulated depreciation 67,403 62,334
Intangible assets, accumulated amortization $ 13,729 $ 12,983
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 2,000,000 2,000,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 44,306,000 34,097,000
Common stock, shares outstanding 44,306,000 34,097,000
Treasury stock, shares 2,436,000 2,436,000
Convertible Series C Preferred Stock [Member]
    
Convertible preferred stock, par value $ 0.001 $ 0.001
Convertible preferred stock, shares issued 87,000 0
Convertible preferred stock, shares outstanding 87,000 0