Annual report pursuant to Section 13 and 15(d)

Leases (Details Textual)

v2.4.1.9
Leases (Details Textual) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Leases [Abstract]      
Lease rent expenses $ 2.6us-gaap_LeaseAndRentalExpense $ 1.9us-gaap_LeaseAndRentalExpense $ 1.3us-gaap_LeaseAndRentalExpense