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Loss Per Share (Tables) | 3 Months Ended
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Mar. 31, 2018
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  |  | Three months ended March 31, |
|  |  | 2017 |  |  | 2018 |
| Net loss | $ | (2,068,216 | ) | $ | (2,567,833 | )
| Weighted average shares used in basic and diluted computation (note) |  | 19,856,778 |  |  | 26,502,086 |
| Loss per share | $ | (0.10 | ) | $ | (0.10 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration