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Share Capital (Details Textual) | Apr. 25, 2017 shares | Mar. 31, 2017 vote shares | Dec. 31, 2016 shares
--- | --- | --- | ---
Preferred Stock [Member] | Series 4 Convertible Preferred Stock [Domain] |  |  |
Share Capital [Line Items] |  |  |
Shares, Outstanding | 95,000 | 95,000 | 0
Common Stock [Member] |  |  |
Share Capital [Line Items] |  |  |
Shares, Outstanding |  | 53,381,692 | 52,802,058
Common Stock [Member] | Common Class A [Member] |  |  |
Share Capital [Line Items] |  |  |
Common Stock, Voting Rights, Number of Votes per Share | vote |  | 1 |
Shares, Outstanding |  | 53,377,937 | 52,798,303
Common Stock [Member] | Common Class B |  |  |
Share Capital [Line Items] |  |  |
Common Stock, Voting Rights, Number of Votes per Share | vote |  | 20 |
Shares, Outstanding |  | 3,755 | 3,755

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- Definition Common Stock, Voting Rights, Number of Votes per Share + References No definition available. + Details
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- Definition Number of shares issued which are neither cancelled nor held in the treasury. + References No definition available. + Details
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