Note 8 - Stock-based Compensation (Tables)

12 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

	Year Ended
	September 30,		October 1,		October 3,
(In thousands)	2017		2016		2015
Stock options:
Compensation expense	$	1,007	$	988	$	1,007

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended
	Septem ber 30 ,			Octo ber 1 ,			Octo ber 3 ,
	201 7			201 6			201 5
Expected term (in years)		5.14			5.45			5.72
Risk-free interest rate		1.98	%		1.30	%		2.18	%
Expected volatility		38.32	%		39.00	%		37.99	%
Expected dividend yield		0.37	%		0.48	%		0.61	%

Share-based Compensation, Stock Options, Activity [Table Text Block]

				Exercise Price						Contractual		Aggregate
				Per Share						Term -		Intrinsic
	Options							Weighted		Weighted		Value
(Share amounts in thousands)	Outstanding			Range				Average		Average (in years)		(in thousands)
Outstanding at September 27, 2014		871			$6.89	-	$20.50	$	14.23
Granted		134			18.05	-	21.96		19.89
Exercised		(27	)		6.89	-	11.15		9.17			$	328
Forfeited		(55	)		9.16	-	21.96		15.37
Outstanding at October 3, 2015		923			7.55	-	21.96		15.14
Granted		99			23.95	-	34.49		28.47
Exercised		(651	)		7.55	-	21.96		13.93				8,718
Outstanding at October 1, 2016		371			9.16	-	34.49		20.81
Granted		88			26.75	-	37.06		30.93
Exercised		(67	)		9.16	-	23.95		19.05				1,212
Outstanding at September 30, 2017		392			9.16	-	37.06		23.40		7.64		1,845
Vested and anticipated to vest in future at September 30, 2017		388							23.36		7.63		1,837
Exercisable at September 30, 2017		194							19.05		6.41		1,491

Schedule of RSU Grants and Compensation Expense [Table Text Block]

	Year Ended
	September 30,		October 1,		October 3,
(In thousands)	2017		2016		2015
Restricted stock unit grants:
Units		37		57		62
Market value	$	1,180	$	1,516	$	1,253
Compensation expense		1,238		1,451		1,291

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

				Weighted
	Restricted			Average
	Stock Units			Grant Date
(Unit amounts in thousands)	Outstanding			Fair Value
Balance, September 27, 2014		197		$	15.68
Granted		62			20.33
Forfeited		(13	)		17.52
Released		(89	)		12.86
Balance, October 3, 2015		157			18.96
Granted		57			26.57
Forfeited		(2	)		23.95
Released		(67	)		17.95
Balance, October 1, 2016		145			22.35
Granted		37			31.95
Released		(54	)		20.43
Balance, September 30, 2017		128			25.92