Note 6 - Stock-Based Compensation - Stock Option Activity (Details) shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 02, 2016 USD ($) $ / shares shares
Minimum [Member]
Outstanding (in dollars per share)	$ 7.55
Exercised (in dollars per share)	7.55
Outstanding (in dollars per share)	7.55
Maximum [Member]
Outstanding (in dollars per share)	21.96
Exercised (in dollars per share)	20.50
Outstanding (in dollars per share)	21.96
Weighted Average [Member]
Outstanding (in dollars per share)	15.14
Exercised (in dollars per share)	12.32
Outstanding (in dollars per share)	$ 15.80
Outstanding (in shares) | shares	923
Exercised (in shares) | shares	(176)
Exercised | $	$ 2,016
Outstanding (in shares) | shares	747
Outstanding	6 years 113 days
Outstanding | $	$ 3,882
Vested and anticipated to vest (in shares) | shares	741
Vested and anticipated to vest (in dollars per share)	$ 15.78
Vested and anticipated to vest	6 years 109 days
Vested and anticipated to vest | $	$ 3,872
Exercisable (in shares) | shares	491
Exercisable (in dollars per share)	$ 13.95
Exercisable at January 2, 2016	5 years 18 days
Exercisable at January 2, 2016 | $	$ 3,421