Pension and Profit Sharing - Periodic Benefit Cost (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assumptions used to determine net periodic benefit cost:
Discount rate		2.99%	3.99%
Expected return on plan assets		6.00%	8.25%
Interest cost		$ 64,649	$ 85,108
Service cost	9,000	40,000	36,000
Expected return on plan assets		(69,439)	(94,765)
Amortization of prior service costs		9,154	9,154
Amortization of actuarial loss		141,171	135,759
Net periodic benefit cost		$ 185,535	$ 171,257