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Computation of loss per share (Details) (USD $) | 12 Months Ended
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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)

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating basic and diluted EPS. + References No definition available. + Details
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