Derivative liability - Liabilities measured at fair value on a recurring basis (Details) (USD $)	Sep. 30, 2012		Dec. 31, 2011
Liabilities:
Derivative liabilities	$ (157,777)	[1]	$ (40,756)	[1]
Total liabilities	(157,777)	[1]	(40,756)	[1]
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Liabilities:
Derivative liabilities	(157,777)	[1]	(40,756)	[1]
Total liabilities	$ (157,777)	[1]	$ (40,756)	[1]

[1] The Company did not have any assets or liabilities measured at fair value using Level 1 or Level 3 of the fair value hierarchy as of September 30, 2012 or 2011.