Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income before income taxes:
Domestic	$ 3,931,365	$ 6,405,112	$ 5,060,452
Foreign	(551,243)	1,798,868	1,402,918
Income before income taxes	3,380,122	8,203,980	6,463,370
Current tax expense:
Federal	1,420,599	1,934,352	1,549,506
State	13,437	173,360	175,814
Foreign	354,314	552,292	443,908
Total current expense	1,788,350	2,660,004	2,169,228
Deferred tax expense (benefit):
Federal	(72,727)	97,588	(223,484)
State	(3,542)	4,580	(1,124)
Foreign	(333,933)	(9,110)	366
Total deferred expense (benefit)	(410,202)	93,058	(224,242)
Provision for income taxes	$ 1,378,148	$ 2,753,062	$ 1,944,986