Fair value (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Total [Member]
Assets:
Total
Liabilities:
Convertible debt, net of beneficial conversion feature	193,236	193,408
Total	193,236	193,408
Level 1 [Member]
Assets:
Total
Liabilities:
Convertible debt, net of beneficial conversion feature	193,236	193,408
Total	193,236	193,408
Level 2 [Member]
Assets:
Total
Liabilities:
Convertible debt, net of beneficial conversion feature
Total
Level 3 [Member]
Assets:
Total
Liabilities:
Convertible debt, net of beneficial conversion feature
Total