Pension Benefits (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
U.S. Plan [Member]
Components of net periodic benefit cost
Service cost	$ 5,250	$ 5,275	$ 10,500	$ 10,550
Interest cost	42,500	43,050	85,000	86,100
Expected return on plan assets	(40,250)	(35,525)	(80,500)	(71,050)
Net actuarial loss
Amortization	23,500	12,825	47,000	25,650
Net periodic benefit cost	31,000	25,625	62,000	51,250
Canadian Plan [Member]
Components of net periodic benefit cost
Service cost
Interest cost	18,884	19,625	37,840	38,883
Expected return on plan assets	(20,723)	(21,536)	(41,525)	(42,670)
Net actuarial loss	3,429	3,564	6,871	7,061
Amortization
Net periodic benefit cost	$ 1,590	$ 1,653	$ 3,186	$ 3,274