Note 7 - Stockholders' Equity (Detail) - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Stock Options [Member], USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock Options [Member]
Expected life (in years)	4 years 317 days	4 years 354 days	4 years 306 days	4 years 343 days
Volatility	59.50%	60.80%	59.60%	61.00%
Risk-free interest rate	0.78%	1.64%	0.78%	1.66%
Weighted average fair value per share of options granted during the period (in Dollars per share)	$ 4.32	$ 3.21	$ 4.21	$ 3.17