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IncomeTaxes - Additional Information (Detail) (USD $)	12 Months Ended
IncomeTaxes - Additional Information (Detail) (USD $)	Dec. 31, 2012
Income Taxes Disclosure [Line Items]
Operating Loss Carryforwards	$ 32,757,000
Operating Loss Carryforwards, Expiration Dates	2013 through 2032
Tax Credit Carryforward, Amount	578,000
Tax Credit Carry Forward Expirations Date	2013 through 2032
Other Tax Carryforward, Gross Amount	$ 651,000

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.