10. Income Taxes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit)	$ 0	$ 0
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities	531,000
Future Equity Adjustment Excess Tax Benefits If And When Realized	181,000
Operating Loss Carryforwards	$ 25,500,000