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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Current assets:    
Accounts receivable, reserves $ 474,000 $ 306,000
Stockholders' equity (deficit):    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 95,000,000 95,000,000
Common stock, shares issued (in shares) 56,594,683 51,955,265
Common stock, shares outstanding (in shares) 56,594,683 51,955,265