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Note 10 - Stock-Based Compensation Plans and Warrants (Detail) - Fair Value Assumptions for Stock Options	12 Months Ended
	Dec. 31, 2012
Risk-free interest rate	3.90%
Expected life (in years)	9 years 146 days
Expected volatility	52.00%
Expected dividend yield	0.00%

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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