Pension Benefits (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
U.S. Plan [Member]
Components of net periodic benefit cost
Service cost	$ 5,250	$ 5,275	$ 15,750	$ 15,825
Interest cost	42,500	43,050	127,500	129,150
Expected return on plan assets	(40,250)	(35,525)	(120,750)	(106,575)
Amortization	23,500	12,825	70,500	38,475
Net periodic benefit cost	31,000	25,625	93,000	76,875
Canadian Plan [Member]
Components of net periodic benefit cost
Interest cost	18,949	19,426	56,789	58,309
Expected return on plan assets	(20,794)	(21,317)	(62,319)	(63,987)
Net actuarial loss	3,441	3,527	10,312	10,588
Net periodic benefit cost	$ 1,596	$ 1,636	$ 4,782	$ 4,910