Future minimum financing obligation payments (Details) (USD $)	Dec. 31, 2013
Future minimum financing obligation payments
Future minimum financing obligation payments2014	$ 459,564
Future minimum financing obligation payments2015	459,564
Future minimum financing obligation payments2016	459,564
Future minimum financing obligation payments2017	459,564
Future minimum financing obligation payments2018	483,132
Future minimum financing obligation payments Thereafter	4,795,976
Total future minimum financing obligation payments	7,117,364
Less interest	(2,825,497)
Present value of future minimum financing obligation payments	$ 4,291,867