Pension Plan (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Components of net periodic pension plan cost [Abstract]
Interest cost	$ 71,750	$ 76,032	$ 143,500	$ 152,064
Expected return on plan assets	(97,500)	(104,965)	(195,000)	(209,929)
Amortization of losses	56,250	42,586	112,500	85,171
Net periodic pension plan cost	$ 30,500	$ 13,653	$ 61,000	$ 27,306