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Ordinary shares (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 05, 2014 | Feb. 06, 2014 | Mar. 22, 2016 | Jun. 30, 2013 | Dec. 31, 2016 | Dec. 31, 2014 | Aug. 31, 2014
Stockholders' Equity, Reverse Stock Split |  |  |  |  | On January 26, 2014, the Company effected the issuance of 6.55-to-1 bonus shares, which was equivalent to a 7.55-to-1 share split. |  |
Stock Issued During Period, Shares, New Issues |  |  | 2,161,290 |  |  |  |
Stock Issued During Period, Value, New Issues |  |  | $ 6,089 |  | $ 6,089 | $ 31,405 |
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Shares |  | 782,537 |  |  |  |  |
Stock Issued During Period Ordinary Shares Issued Upon Private Placement Value |  | $ 4,368 |  |  |  | $ 4,368 |
Shares Issued, Price Per Share |  | $ 6.07 | $ 3.10 | $ 0.95 | $ 3.10 | $ 0.95 |
IPO [Member] |  |  |  |  |  |  |
Share Purchase Agreement, Value to be issued | $ 31,405 |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 3,200,000 |  |  |  |  |  |
Shares Issued, Price Per Share |  |  |  |  |  | $ 11.00 | $ 11.00
Purchase Agreement [Member] |  |  |  |  |  |  |
Share Purchase Agreement, Shares to be issued |  |  |  | 2,130,159 |  |  |
Share Purchase Agreement, Value to be issued |  |  |  | $ 2,024 |  |  |

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- Definition The number of shares to be issued according to the share purchase agreement. + References No definition available. + Details
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- Definition Number of ordinary stock issued upon private placement during the period. + References No definition available. + Details
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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 + Details
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