Pension and Other Postretirement Benefits (Details 1) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Summary of net amount recognized on consolidated balance sheets
Non-current liabilities	$ (2,128,210)	$ (2,051,054)
US Plan [Member]
Summary of net amount recognized on consolidated balance sheets
Non-current liabilities	(1,851,122)	(1,761,856)
Net amount recognized	(1,851,122)	(1,761,856)
Canadian Plan [Member]
Summary of net amount recognized on consolidated balance sheets
Non-current liabilities	(212,858)	(229,316)
Net amount recognized	$ (212,858)	$ (229,316)