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Note 11 - Stock Based Compensation (Detail) - Fair Value Of Stock Options Assumption (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Weighted average fair value per option (in Dollars per share)	$ 2.89	$ 6.40
Expected volatility	90.00%	94.00%
Risk-free interest rate	0.83%	1.02%
Expected life (years)	7 years 36 days	7 years 36 days

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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