v2.4.0.6
Summary of significant accounting policies (Details) (USD $)
 0 Months Ended 3 Months Ended 6 Months Ended 26 Months Ended
Oct. 05, 2010
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Dec. 31, 2011
Oct. 14, 2010
Deferred offering costs                
Deferred offering costs included as a reduction to additional paid-in capital   $ 1,600,000   $ 1,600,000   $ 1,600,000 $ 1,600,000  
Loss per share                
Ordinary shares issued to Sponsor, shares   1,437,500   1,437,500   1,437,500    
Ordinary shares issued to Sponsor, price per share   $ 0.01739   $ 0.01739   $ 0.01739   $ 10.0
Ordinary shares repurchased from Sponsor, shares 287,500              
Ordinary shares repurchased from Sponsor, aggregate purchase price 1              
Potentially dilutive securities                
Total potentially dilutive securities   9,340,000 9,340,000 9,340,000 9,340,000 9,340,000    
Concentration of credit risk                
Federal insurance coverage amount per depositor       $ 250,000        
Ordinary shares subject to possible repurchase                
Percentage of shareholders required to vote against the Business Combination to block the transaction       49.90%        
Number of shares required to vote against the Business Combination to block the transaction       2,295,400        
Warrants [Member]
                
Potentially dilutive securities                
Total potentially dilutive securities   8,940,000 8,940,000 8,940,000 8,940,000 8,940,000    
Underwriter's options [Member]
                
Potentially dilutive securities                
Total potentially dilutive securities   400,000 400,000 400,000 400,000 400,000