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Components of Income Tax Expense (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 448,832	$ 720,259	$ 472,423
State	186,616	261,679	253,573
Total current	635,448	981,938	725,996
Deferred income taxes (benefits):
Federal	(5,130)	(156,652)	(231,837)
State	43,489	(57,876)	(8,648)
Total deferred taxes (benefits)	38,359	(214,529)	(240,485)
Income tax expense	$ 673,807	$ 767,410	$ 485,511

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The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable Income or Loss from continuing operations.

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