Pension and Profit Sharing - Benefit Obligation (Details) (USD $)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assumptions used to determine benefit obligation:
Discount rate		3.23%	3.78%
Benefit obligation at beginning of year	$ (1,904,377)	$ (1,886,636)	$ (2,225,693)
Interest cost		(69,806)	(64,649)
Service cost	(9,000)	(25,000)	(40,000)
Actuarial gain (loss)	115,000	(256,446)	51,022
Benefits and plan expenses paid		333,511	392,684
Benefit obligation at end of year		$ (1,904,377)	$ (1,886,636)