Computation of loss per share (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Amounts used in computing loss per share	$ 1,845,323	$ 12,740,816
Weighted average number of common shares outstanding used in loss per share for the period (denominator)	62,838,381	54,702,212
Basic and diluted loss per share of common stock	$ (0.03)	$ (0.23)

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

No definition available.

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Period Type:	duration