Note 7 - Stockholders' Equity (Detail) - Employee Stock Purchase Plan: (Employee Stock Purchase Plan [Member], USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Employee Stock Purchase Plan [Member]
Expected life (in years)	1 year 3 months	1 year 3 months
Volatility	51.10%	47.20%
Risk-free interest rate	0.16%	0.38%
Weighted average fair value of purchase rights granted under the purchase plan (in Dollars per share)	$ 2.33	$ 2.06