Pension and Profit Sharing - Amounts Recognized in Other Comprehensive Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Balance at beginning of the year	$ 1,426,030	$ 1,379,890
Change in net loss	(169,818)	177,647
Amortization of actuarial loss	(124,854)	(122,352)
Amortization of prior service cost	(543)	(9,155)
Change recognized in other comprehensive income	(295,215)	46,140
Total recognized in other comprehensive income	1,130,815	1,426,030
Amounts recognized in accumulated other comprehensive income:
Net actuarial loss			$ 1,128,647	$ 1,423,319
Prior service cost			2,168	2,711
Total	$ 1,426,030	$ 1,379,890	$ 1,130,815	$ 1,426,030