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Summary of significant accounting policies (Tables) | 9 Months Ended
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Sep. 30, 2015
Accounting Policies [Abstract] |
Schedule Of Property, Plant And Equipment Estimated Useful Lives [Table Text Block] | Depreciation is computed on a straight-line basis, based on the following estimated useful lives:
Buildings |  | 20 years
Machinery and equipment |  | 10 years
Furniture and fixtures |  | 10 years
Office equipment and software |  | 5 years
Vehicles |  | 5 years
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of the basic and diluted earnings per share for the three- and nine-month periods ended September 30, 2015 and 2014:
|  | (in thousands except per share amounts) |
|  | Three months ended September 30, |  | Nine months ended September 30, |
|  | 2015 |  | 2014 |  | 2015 |  | 2014 |
Net (Loss) Income |  | $ | (1,938) |  | $ | 13,120 |  | $ | (11,076) |  | $ | (2,911) |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for basic earnings per ordinary share - weighted average shares outstanding |  |  | 25,426,250 |  |  | 24,364,014 |  |  | 25,127,179 |  |  | 24,306,288 |
Effect of dilutive warrants, unit purchase options and contingently issuable shares |  |  | 5,399,081 |  |  | 4,273,152 |  |  | 4,607,484 |  |  | 3,954,980 |
Denominator for diluted earnings per ordinary share - weighted average shares outstanding |  |  | 30,825,331 |  |  | 28,637,166 |  |  | 29,734,663 |  |  | 28,261,268 |
Basic earnings per ordinary share |  | $ | (0.08) |  | $ | 0.54 |  | $ | (0.44) |  | $ | (0.12) |
Diluted earnings per ordinary share |  | $ | (0.08) |  | $ | 0.46 |  | $ | (0.44) |  | $ | (0.12) |

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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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