Note 8 - Equity Plans (Details) - Stock Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 29, 2012
Stock Option Activity [Abstract]
Outstanding, Number of Options			40,339
Outstanding, Weighted Average Exercise Price (in Dollars per share)			$ 21.79
Outstanding, Weighted Average Remaining Contractual Term	2 years 292 days
Exercisable at September 30, 2013	27,172
Exercisable at September 30, 2013 (in Dollars per share)	$ 27.40
Exercisable at September 30, 2013	2 years 292 days
Exercisable at September 30, 2013 (in Dollars)	$ 108
Granted	0
Granted (in Dollars per share)	$ 0
Exercised	(11,667)	(2,170)
Exercised (in Dollars per share)	$ 7.33
Canceled	(1,500)
Canceled (in Dollars per share)	$ 32.63
Outstanding, Number of Options	27,172		40,339
Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 27.40		$ 21.79
Outstanding, Weighted Average Remaining Contractual Term	2 years 292 days
Outstanding, Aggregate Intrinsic Value (in Dollars)	$ 108