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Shareholders' Equity, Warrants (Details) - $ / shares | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Class of Warrant or Right [Line Items] |  |
Term of warrants from date of issuance | 7 years |
Expiry date of warrants | Feb. 14, 2018 |
Series A Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Cash receivable per share under warrant (in dollars per share) | $ 12.50 |
Exercise price of warrants (in dollars per share) | $ 51.21 |
Warrants outstanding (in shares) | 237,977 | 239,306
Series A Warrants [Member] | Class A [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number of shares warrants are entitled to purchase (in shares) | 6.02 |
Series B Warrants [Member] |  |
Class of Warrant or Right [Line Items] |  |
Cash receivable per share under warrant (in dollars per share) | $ 12.50 |
Exercise price of warrants (in dollars per share) | $ 56.51 |
Warrants outstanding (in shares) | 322,110 | 323,915
Series B Warrants [Member] | Class A [Member] |  |
Class of Warrant or Right [Line Items] |  |
Number of shares warrants are entitled to purchase (in shares) | 6.03 |

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- Definition Refers to term of warrants from the date initially issued, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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