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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Consolidated Balance Sheets [Abstract]    
Accumulated depreciation and amortization $ 8,837 $ 8,066
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000 5,000
Preferred stock, shares issued 1,495 1,495
Preferred stock, shares outstanding 1,495 1,495
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 150,000 150,000
Common stock, shares issued 62,380 62,148
Common stock, shares outstanding 62,380 62,148