Note 2 - Summary of Significant Accounting Policies (Details) - Assumptions used in valuing the stock options granted:	12 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Employee Stock Option [Member] Minimum [Member]	Jun. 30, 2013 Employee Stock Option [Member] Maximum [Member]	Jun. 30, 2013 Minimum [Member]	Dec. 31, 2012 Minimum [Member]	Jun. 30, 2013 Maximum [Member]	Dec. 31, 2012 Maximum [Member]
Note 2 - Summary of Significant Accounting Policies (Details) - Assumptions used in valuing the stock options granted: [Line Items]
Risk-free interest rate		0.02%	1.92%	0.13%	0.17%	0.40%	0.29%
Expected dividend yield	0.00%	0.00%		0.00%	0.00%
Expected life (Years)		5 years	7 years 109 days	306 days	1 year 32 days	2 years 58 days	2 years 149 days
Expected volatility	80.80%	80.71%	89.66%	68.47%	82.75%	87.18%	95.91%