|
Stockholders' deficiency - Stock options valuation assumptions (Details 3) (Stock Options)
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12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Dividend rate | 0.00% | 0.00% |
| Volatility | 74.00% | |
| Risk-free rate | 1.00% | 1.25% |
| Term - years | 2 years 1 month 6 days | |
|
Minimum [Member]
|
||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Volatility | 73.00% | |
| Term - years | 1 year | |
|
Maximum [Member]
|
||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Volatility | 85.00% | |
| Term - years | 3 years | |