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.