Accounting policies (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accounting Policies [Line Items]
Foreign Currency Transaction Gain (Loss), before Tax	$ (97,438)	$ (115,053)	$ (272,533)	$ 46,680
Certificates of Deposit, at Carrying Value	5,637,538		5,637,538		$ 5,000,000
Certificates of Deposit [Member]
Accounting Policies [Line Items]
Cash Equivalents, at Carrying Value	17,500,000		17,500,000		$ 3,000,000
BELIZE
Accounting Policies [Line Items]
Deposits held in foreign bank	4,000,000		4,000,000
BAHAMAS
Accounting Policies [Line Items]
Deposits held in foreign bank	$ 31,000,000		$ 31,000,000