Pension and Profit Sharing - Amounts Recognized in Other Comprehensive Income (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
Balance at beginning of the year	$ 1,762,345	$ 1,830,465
Change in net loss	82,657	65,570
Amortization of actuarial loss	(135,759)	(124,536)
Amortization of prior service cost	(9,154)	(9,154)
Change recognized in other comprehensive income	(62,256)	(68,120)
Total recognized in other comprehensive income	1,700,089	1,762,345
Net actuarial loss	1,669,914	1,723,016
Prior service cost	30,175	39,329
Total	$ 1,700,089	$ 1,762,345