| Member loans (Details) | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2013
 USD ($) | Dec. 31, 2012
 USD ($) | Feb. 28, 2009
 Demand Loans [Member]
 USD ($) | Dec. 31, 2013
 Demand Loans [Member]
 USD ($) | Dec. 31, 2012
 Demand Loans [Member]
 USD ($) | Dec. 31, 2007
 Demand Loans [Member]
 USD ($) | Dec. 31, 2007
 Demand Loans [Member]
 Minimum [Member] | Dec. 31, 2007
 Demand Loans [Member]
 Maximum [Member] | Oct. 31, 2009
 Notes Payable Related Party [Member]
 USD ($) | Dec. 31, 2012
 Notes Payable Related Party [Member]
 USD ($) | Oct. 13, 2009
 Notes Payable Related Party [Member]
 USD ($) | Dec. 09, 2011
 Loan Agreement One [Member]
 GBP (£) | Dec. 09, 2011
 Loan Agreement Two [Member]
 GBP (£) | Dec. 31, 2013
 Loan Agreements [Member]
 USD ($) | Dec. 31, 2012
 Loan Agreements [Member]
 USD ($) | |
| Debt Instrument [Line Items] | |||||||||||||||
| Loans payable | $ 5,027,613 | $ 4,181,391 | $ 2,000,000 | $ 846,222 | |||||||||||
| Interest rate | 6.00% | 12.00% | 12.00% | 8.00% | 8.00% | ||||||||||
| Conversion of debt to equity | 1,000,000 | ||||||||||||||
| Note payable forgiven | 500,000 | ||||||||||||||
| Accrued interest on member loans | 277,633 | 1,398,925 | |||||||||||||
| Interest expense | 281,180 | 358,104 | 281,299 | 8,408 | 72,167 | 45,379 | |||||||||
| Face value of debt | 4,392,777 | 750,000 | 230,000 | 300,000 | |||||||||||
| Maturity | Oct. 14, 2014 | ||||||||||||||
| Additional funding | $ 26,652 | ||||||||||||||