Shareholders' equity and capital stock (Tables)
|
12 Months Ended |
Dec. 31, 2012
|
Stockholders' Equity Note [Abstract] |
|
Schedule Of Share-Based Compensation, Warrants, Activity [Table Text Block] |
Activity with respect to warrants is summarized as follows:
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Weighted- |
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average |
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Warrants |
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exercise price |
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# |
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$ |
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Outstanding, December 31, 2009 |
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- |
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|
- |
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Granted |
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100,000 |
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|
1.20 |
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|
|
|
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|
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Outstanding, December 31, 2010 |
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100,000 |
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1.20 |
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|
|
|
|
|
|
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Outstanding, December 31, 2011 |
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100,000 |
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1.20 |
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Granted |
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50,000 |
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|
0.99 |
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|
|
|
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|
|
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Outstanding, December 31, 2012 |
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150,000 |
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1.13 |
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Schedule Of Share-based Compensation Shares Authorized Under Warrants Plans by exercise price range [Table Text Block] |
As of December 31, 2012, outstanding warrants are as follows:
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Weighted- |
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average |
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Aggregate |
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Exercise |
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remaining |
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Intrinsic |
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price |
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Number |
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contractual |
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Value |
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$ |
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of warrants |
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life (years) |
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$ |
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Expiry |
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0.99 |
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50,000 |
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2.7 |
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|
|
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September 4, 2015 |
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1.20 |
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100,000 |
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2.8 |
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- |
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November 1, 2015 |
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150,000 |
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2.8 |
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- |
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Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
Activity with respect to stock options is summarized as follows:
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Weighted- |
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average |
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|
Options |
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|
exercise price |
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|
# |
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$ |
|
Outstanding, December 31, 2009 |
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8,361,452 |
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|
1.65 |
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Granted |
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798,537 |
|
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|
0.81 |
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Exercised |
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(3,057,444 |
) |
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1.15 |
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Forfeited |
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|
(75,470 |
) |
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0.84 |
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Expired |
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(361,507 |
) |
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2.06 |
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|
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Outstanding, December 31, 2010 |
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5,665,568 |
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|
1.79 |
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Granted |
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3,162,098 |
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|
2.05 |
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Exercised |
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(1,677,432 |
) |
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|
2.00 |
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Forfeited |
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(241,332 |
) |
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|
2.11 |
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Expired |
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(495,000 |
) |
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2.59 |
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|
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Outstanding, December 31, 2011 |
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6,413,902 |
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1.79 |
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Granted |
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3,114,207 |
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|
0.87 |
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Exercised |
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(88,473 |
) |
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0.85 |
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Forfeited |
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(145,414 |
) |
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1.99 |
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Expired |
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(782,500 |
) |
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3.25 |
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Outstanding, December 31, 2012 |
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8,511,722 |
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1.32 |
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|
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
As of December 31, 2012, outstanding stock options are as follows:
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Options outstanding |
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Options exercisable |
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Weighted- |
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Weighted- |
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average |
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Aggregate |
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|
average |
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Aggregate |
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|
Exercise |
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|
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remaining |
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Intrinsic |
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|
remaining |
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Intrinsic |
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|
price |
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Number |
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contractual |
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Value |
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|
Number |
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|
contractual |
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|
Value |
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$ |
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|
of options |
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|
life (years) |
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|
$ |
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|
of options |
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|
life (years) |
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|
$ |
|
|
Expiry |
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|
|
|
|
|
|
|
|
|
|
|
|
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1.65 |
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680,000 |
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0.4 |
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|
- |
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680,000 |
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0.4 |
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|
- |
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May 8, 2013 |
|
1.72 |
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25,000 |
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0.6 |
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- |
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25,000 |
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0.6 |
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|
- |
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August 6, 2013 |
|
0.71 |
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|
437,268 |
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|
1.1 |
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52,472 |
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|
437,268 |
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1.1 |
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|
52,472 |
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February 9, 2014 |
|
0.90 |
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|
813,028 |
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1.7 |
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|
- |
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|
813,028 |
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1.7 |
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|
- |
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September 2, 2014 |
|
0.81 |
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|
554,074 |
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|
2.2 |
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|
11,081 |
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|
554,074 |
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|
2.2 |
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|
11,081 |
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March 5, 2015 |
|
2.87 |
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|
1,318,293 |
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|
3.1 |
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|
- |
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1,318,293 |
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|
3.1 |
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|
- |
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January 28, 2016 |
|
1.57 |
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|
645,000 |
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3.5 |
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|
- |
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|
490,200 |
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3.5 |
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|
- |
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July 7, 2016 |
|
1.17 |
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784,109 |
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|
3.7 |
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|
- |
|
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|
595,923 |
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|
3.7 |
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|
|
- |
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September 9, 2016 |
|
1.16 |
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|
200,000 |
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|
3.8 |
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|
- |
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|
152,000 |
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3.8 |
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|
|
- |
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October 24, 2016 |
|
0.91 |
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1,136,368 |
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4.0 |
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|
- |
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|
605,324 |
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|
4.0 |
|
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|
- |
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January 12, 2017 |
|
1.39 |
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|
200,000 |
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|
4.1 |
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|
- |
|
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|
108,000 |
|
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|
4.1 |
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|
- |
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February 1, 2017 |
|
1.18 |
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|
100,000 |
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|
4.2 |
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|
- |
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|
54,000 |
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|
4.2 |
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|
- |
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March 1, 2017 |
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0.76 |
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1,618,582 |
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|
4.9 |
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|
|
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161,862 |
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4.9 |
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|
11,330 |
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December 7, 2017 |
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1.32 |
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8,511,722 |
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|
3.2 |
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|
63,553 |
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|
5,994,972 |
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|
2.6 |
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|
74,883 |
|
|
|
|
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
Activity with respect to RSUs is summarized as follows:
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|
|
|
|
Weighted |
|
|
|
|
|
|
average grant |
|
|
|
RSU |
|
|
date fair value |
|
|
|
# |
|
|
$ |
|
Unvested, December 31, 2010 |
|
|
- |
|
|
|
- |
|
Granted |
|
|
355,662 |
|
|
|
2.87 |
|
Vested |
|
|
- |
|
|
|
- |
|
Forfeited |
|
|
(79,297 |
) |
|
|
2.87 |
|
|
|
|
|
|
|
|
|
|
Unvested, December 31, 2011 |
|
|
276,365 |
|
|
|
2.87 |
|
Granted |
|
|
703,572 |
|
|
|
0.91 |
|
Vested |
|
|
(136,789 |
) |
|
|
2.87 |
|
Forfeited |
|
|
(16,723 |
) |
|
|
1.66 |
|
|
|
|
|
|
|
|
|
|
Unvested, December 31, 2012 |
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|
826,425 |
|
|
|
1.53 |
|
|
Schedule Of Share-Based Compensation, Shares Authorized Under Restricted Stock Units, By Grant Date [Table Text Block] |
As of December 31, 2012, outstanding RSUs are as follows:
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|
|
|
Weighted- |
|
|
|
|
|
|
|
|
|
average |
|
|
Aggregate |
|
|
|
Number of |
|
|
remaining |
|
|
Intrinsic |
|
|
|
unvested |
|
|
amortization |
|
|
Value |
|
Grant date |
|
options |
|
|
life (years) |
|
|
$ |
|
January 28, 2011 |
|
|
133,147 |
|
|
|
0.08 |
|
|
|
110,512 |
|
January 12, 2012 |
|
|
288,618 |
|
|
|
1.03 |
|
|
|
239,553 |
|
December 7, 2012 |
|
|
404,660 |
|
|
|
1.93 |
|
|
|
335,868 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
826,425 |
|
|
|
1.32 |
|
|
|
685,933 |
|
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
The following assumptions were used in performing the valuations:
|
|
2012 |
|
2011 |
|
2010 |
|
|
|
|
|
|
|
Expected warrant life (years) |
|
1.50 |
|
0 |
|
2.75 |
Expected option life (years) |
|
3.29 - 3.37 |
|
3.24 - 3.28 |
|
3.12 - 3.14 |
Expected volatility |
|
63-78% |
|
79-82% |
|
81-82% |
Risk-free interest rate |
|
1.0-1.3% |
|
1.3-1.9% |
|
1.7-1.9% |
Forfeiture rate (warrants) |
|
0.0% |
|
0.0% |
|
0.0% |
Forfeiture rate (options) |
|
4.6-4.8% |
|
4.4-5.1% |
|
4.3% |
Forfeiture rate (RSUs) |
|
12.5-22.3% |
|
5.0% |
|
5.0% |
Expected dividend rate |
|
0% |
|
0% |
|
0% |
|