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Stock incentive plan and share-based compensation (Details Textual)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended
Aug. 31, 2012
Sep. 30, 2012
USD ($)
Sep. 30, 2011
USD ($)
Sep. 30, 2012
USD ($)
Sep. 30, 2012
GBP (£)
Sep. 30, 2011
USD ($)
Mar. 26, 2012
GBP (£)
Dec. 31, 2011
Sep. 30, 2012
Noncontrolling Interest [Member]
USD ($)
Sep. 30, 2011
Noncontrolling Interest [Member]
USD ($)
Aug. 09, 2012
Each Current Independent Director Of Board [Member]
Aug. 09, 2012
Officers and Certain Employees [Member]
Sep. 30, 2012
Restricted Stock [Member]
USD ($)
Sep. 30, 2012
Restricted Stock [Member]
USD ($)
Sep. 30, 2012
Former Director [Member]
USD ($)
Sep. 30, 2012
Former Director [Member]
USD ($)
Aug. 10, 2012
Former Director [Member]
Mar. 26, 2012
Medicsights [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term       7 years 7 years                          
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term       5 years 5 years                          
Par Value Per Share of Existing Ordinary Shares             £ 0.05                      
Share-based Compensation   $ 220 $ (77) $ 449   $ 144     $ 15 $ 39     $ 220 $ 232 $ 0 $ 185    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   415,000   415,000 415,000                          
Percentage of Stockholder Incentive Stock Option Granted on Date of Grant       10.00% 10.00%                          
Share-based Compensation Arrangement by Share-based Payment Restricted Shares Issued   232,000   232,000 232,000           21,000 190,000         33,000  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized   $ 1,100   $ 1,100                            
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition       1 year 2 months 12 days 1 year 2 months 12 days                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term       6 years 7 months 6 days 6 years 7 months 6 days                          
Stockholders' Equity, Reverse Stock Split       1 for 500 1 for 500                         1 for 325,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   6   6 6     6                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 6,000                                  
Number of Options Granted Under Stock Option Plan J       24 24                          
Par Value Per Share of New Ordinary Shares         £ 16,250