Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Preferred stock, par value $ 0.001 $ 0.001 $ 0.001
Preferred stock, shares authorized 10,000,000 10,000,000 10,000,000
Common stock, par value $ 0.001 $ 0.001 $ 0.001
Common stock, shares authorized 200,000,000 200,000,000 200,000,000
Common stock, shares issued 23,537,978 23,513,978 21,210,445
Common stock, shares outstanding 23,537,978 23,513,978 21,210,445
Treasury stock, shares 25,000 25,000  
Series B Convertible Preferred Stock [Member]
      
Preferred stock, par value $ 0.001 $ 0.001 $ 0.001
Preferred stock, shares authorized 10,000 10,000 10,000
Preferred stock - Series B, stated value $ 1,000 $ 1,000 $ 1,000
Preferred stock - Series B, liquidation preference $ 5,659,000 $ 5,659,000 $ 5,679,000
Preferred stock, shares issued 5,659 5,659 5,679
Preferred stock, shares outstanding 5,659 5,659 5,679