Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details Textual)

v2.4.0.6
Fair Value Measurements (Details Textual) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Fair Value Measurements (Textual) [Abstract]    
Treasury securities maturity $ 8,092,000 $ 8,092,000
Contingent consideration 20,100,000  
Accrued expenses 5,200,000  
Other long-term liabilities 14,900,000  
US Treasury securities [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Treasury securities maturity date 1 Jul. 26, 2012  
Treasury securities maturity date 2 Sep. 28, 2012  
Treasury securities mature on July 26, 2012 [Member] | US Treasury securities [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Treasury securities maturity 10,000,000  
Treasury securities mature on September 28, 2012 [Member] | US Treasury securities [Member]
   
Fair Value Measurements (Textual) [Abstract]    
Treasury securities maturity $ 15,000,000