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Stock-based Compensation (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Schedule of changes in common stock options [Table Text Block] |
|  |  |  |  | Weighted |
|  |  |  |  | Average |
|  |  |  |  | Exercise |
|  | Options |  |  | Price |
Outstanding at December 31, 2012 |  | 3,898,198 |  | $ | 1.75 |
Granted |  | 200,000 |  | $ | 1.00 |
Exercised |  | (30,000 | ) | $ | 0.51 |
Forfeited |  | — |  |  | N/A |
Expired |  | (3,198 | ) | $ | 2.40 |
Outstanding at June 30, 2013 |  | 4,065,000 |  | $ | 1.72 |
Options exercisable at June 30, 2013 |  | 2,030,000 |  | $ | 1.59 |
|  |  |  |  | Weighted |
|  |  |  |  | Average |
|  |  |  |  | Exercise |
|  | Options |  |  | Price |
Outstanding at December 31, 2011 |  | 3,141,198 |  | $ | 1.65 |
Granted |  | 1,040,000 |  | $ | 2.04 |
Exercised |  | (21,750 | ) | $ | 0.63 |
Forfeited |  | (250,000 | ) | $ | 1.83 |
Expired |  | (1,250 | ) | $ | 1.40 |
Outstanding at June 30, 2012 |  | 3,908,198 |  | $ | 1.75 |
Options exercisable at June 30, 2012 |  | 1,283,198 |  | $ | 1.37 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration