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Derivative liability and fair value measurements (Details Textual) (USD $)	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2008 Third Party Lender [Member]
Potential Debt Conversion, Converted Instrument, Shares Issued			1,309,983			3,000,000
Derivative Liabilities, Current	$ 37,990		$ 37,990		$ 31,440
Derivative, Gain (Loss) on Derivative, Net, Total	$ (13,100)	$ 10,087	$ (6,550)	$ 11,135

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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