Note 13 - Equity Plans (Detail) - Stock Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2010
Granted	0
Granted (in Dollars per share)	$ 0
Exercised	(4,168)	(8,000)
Exercised (in Dollars per share)	$ 8.09
Canceled	(1,500)
Canceled (in Dollars per share)	$ 32.63
Outstanding at December 31, 2012	40,339	46,007
Outstanding at December 31, 2012 (in Dollars per share)	$ 21.79
Outstanding at December 31, 2012	2 years 292 days
Outstanding at December 31, 2012 (in Dollars)	$ 143
Exercisable at December 31, 2012	40,339
Exercisable at December 31, 2012 (in Dollars per share)	$ 21.79	$ 20.90
Exercisable at December 31, 2012	2 years 292 days
Exercisable at December 31, 2012 (in Dollars)	$ 143