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Note 9 - Stock option plans: (Detail) - The fair value of stock options granted during the years ended December 31, 2011, 2010 and 2009 was (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Volatility	52.10%	73.70%	71.90%
Risk-free interest rate	0.50%	0.80%	1.90%
Expected life (in years)	4 years	4 years	4 years 146 days
The weighted average grant date fair value for options issued, with the exercise price equal to market value on the date of grant (in Dollars per share)	$ 0.56	$ 0.38	$ 0.39

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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