Stockholders' deficit (Narrative) (Details) (USD $)	6 Months Ended			1 Months Ended	6 Months Ended			0 Months Ended										0 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2008 Warrant [Member]	Jun. 30, 2012 Warrant [Member]	Dec. 31, 2011 Warrant [Member]	Dec. 31, 2010 Warrant [Member]	Jun. 07, 2012 Common Stock [Member]	Jun. 05, 2012 Common Stock [Member]	May 23, 2012 Common Stock [Member]	May 17, 2012 Common Stock [Member]	May 09, 2012 Common Stock [Member]	May 07, 2012 Common Stock [Member]	Apr. 30, 2012 Common Stock [Member]	Jan. 05, 2012 Common Stock [Member]	May 31, 2012 Common Stock in Consideration for Services [Member]	Mar. 08, 2012 Common Stock in Consideration for Services [Member]	May 31, 2012 Common Stock in Consideration for Cash [Member]	Mar. 08, 2012 Common Stock in Consideration for Cash [Member]	May 23, 2012 ISS [Member]
Stockholders' deficit [Abstract]
Common stock, shares authorized	1,000,000,000		1,000,000,000
Common stock, par value per share	$ 0.001		$ 0.001
Subsidiary or Equity Method Investee [Line Items]
Preferred stock, shares authorized																				125,000
Preferred stock, par value per share																				$ 1.0
Common Stock
Common stock issued for convertible note agreement, shares								9,800,000	8,333,333	9,230,769	8,571,429	5,000,000	4,347,826	4,347,826	7,758,621	5,224,444		23,888,888
Stock for conversion of debt	$ 71,500							$ 9,800	$ 5,000	$ 12,000	$ 12,000	$ 11,500	$ 10,000	$ 10,000	$ 4,500	$ 20,014		$ 43,000
Price per share								$ 0.001	$ 0.0006	$ 0.0013	$ 0.0014	$ 0.0023	$ 0.0023	$ 0.0023	$ 0.00058	$ 0.004		$ 0.0016
Common stock payable	$ 526,000,000																$ 3,520		$ 8,000
Class of Warrant or Right [Line Items]
Warrants outstanding			150,000			150,000
Warrants granted				150,000	150,000
Exercise price of warrants							$ 0.05
Conversion ratio of warrants to common stock				1