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Share capital and additional paid-in capital (Details Textual) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012
Options Redemption Price | $ 0.01
Class B Common Stock [Member] |
Options Exercise Price | $ 50
Common Stock, Capital Shares Reserved for Future Issuance | 145,000
Grant Of Options To Common Stock Share Holders and Preferred Stock Share Holders | 1/100 of a share
Criteria One Description | if a person or group acquires or commences a tender offer for 20% or more of the Company's common shares.
Criteria Two Description | Option holders (other than the acquiring person or group) will also be entitled to buy, for the $37.50 exercise price, common shares with a then market value of $100.00 in the event a person or group actually acquires 20% or more of the Company's common shares.
Option Expiration Date | Jul. 31, 2017

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- Definition It describes the criteria for determining the exercise price. + References No definition available. + Details
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- Definition It represents number of shares granted to common stock share holders and preferred stock share holders. + References No definition available. + Details
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- Definition Represents the expiration date of options. + References No definition available. + Details
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- Definition Represents the exercise price of options. + References No definition available. + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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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