Property and Equipment (Detail) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Depreciation, Depletion and Amortization, Nonproduction	$ 903,291	$ 834,861

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References+ Details