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Long term debt (Details Textual) (USD $) | 12 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Non Revolving Credit Facility [Member] | Dec. 31, 2011 Non Revolving Credit Facility [Member] | Oct. 31, 2011 Non Revolving Credit Facility [Member] | Dec. 31, 2012 5.95% Loan Secured Through An Inter Creditor Agreement With The Republic Bank And Trust [Member] | Sep. 30, 2010 7.5% Series A Bonds [Member] | Dec. 31, 2012 7.5% Series A Bonds [Member] | Jul. 31, 2005 7.5% Series A Bonds [Member] C W-Bahamas [Member] | Dec. 31, 2012 7.5% Series A Bonds [Member] C W-Bahamas [Member]
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 5.95% |  | 7.50% |  |
Debt Instrument, Periodic Payment |  |  |  |  |  |  | $ 526,010 |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  |  |  | Aug. 04, 2009 |  | Jun. 30, 2015 |  |
Debt Instrument Premium Percentage |  |  |  |  |  |  | 1.50% |  |  |  |
Maximum Capital Expenditure |  |  |  |  |  |  | 2,000,000 |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  |  |  |  |  |  | 10,000,000 |
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate |  |  |  |  |  |  |  |  |  |  | 7.50%
Principal repayments of long term debt | 10,125,150 | 1,531,946 | 2,944,085 |  |  |  |  | 1,500,000 |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | 10,000,000 |  |  |  |  |
Line Of Credit Facility Amount Drawn |  |  |  | $ 7,500,000 | $ 7,500,000 |  |  |  |  |  |
Line Of Credit Facility Base Interest Rate |  |  |  | 1.00% | 1.00% |  |  |  |  |  |
Line of Credit Facility, Interest Rate Description |  |  |  | Interest on this loan was based on the bank's term deposit rate plus 1% per annum. | Interest on this loan was based on the bank's term deposit rate plus 1% per annum. |  |  |  |  |  |

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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 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. + Details
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