Related party transactions (Details) (Richmont Holdings, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013
Related party transactions
Reimbursement fee payable per month		$ 150,000
Increase in reimbursement fee payable after six months		10,000
Expense Reimbursement Fees	$ 480,000		$ 1,390,000
Minimum
Related party transactions
Term of agreement		1 year