Pension and Profit Sharing - Benefit Obligation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assumptions used to determine benefit obligation:
Discount rate		3.78%	2.99%
Benefit obligation at beginning of year	$ (1,886,636)	$ (2,225,693)	$ (2,259,522)
Interest cost		(64,649)	(85,108)
Service cost	(9,000)	(40,000)	(36,000)
Actuarial gain (loss)	115,000	51,022	(137,609)
Benefits and plan expenses paid		392,684	292,546
Benefit obligation at end of year		$ (1,886,636)	$ (2,225,693)