Note 8 - Stockholders' Equity (Tables)

12 Months Ended

May 25, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Activity [Table Text Block]

				Restricted Stock Outstanding					Stock Options Outstanding
	RSUs and Options Available for Grant			Number of Restricted Shares			Weighted Average Grant Date Fair Value		Number of Stock Options			Weighted  Average Exercise Price
Balance at May 29, 2011		640,976			415,085		$	5.96		2,318,753		$	6.34
Granted		(191,333	)		47,833		$	6.67		143,500		$	6.67
Awarded/Exercised		—			(111,252	)	$	6.36		(371,727	)	$	5.40
Forfeited		—			(3,500	)	$	5.84		(5,657	)	$	5.76
Plan shares expired		—			—			—		(38,437	)	$	8.23
Balance at May 27, 2012		449,643			348,166		$	5.93		2,046,432		$	6.50
Granted		(26,666	)		6,666		$	9.01		20,000		$	9.01
Awarded/Exercised		—			(231,086	)	$	5.74		(671,563	)	$	6.30
Forfeited		—			(28,416	)	$	6.20		(44,977	)	$	6.34
Plan shares expired		—			—			—		(10,000	)	$	13.32
Balance at May 26, 2013		422,977			95,330		$	6.52		1,339,892		$	6.58
Additional shares reserved		2,000,000			—			—		—			—
Granted		(420,131	)		128,631		$	14.30		291,500		$	14.30
Awarded/Exercised		—			(62,499	)	$	6.18		(398,080	)	$	6.45
Forfeited		—			(12,162	)	$	8.86		(12,452	)	$	6.66
Plan shares expired		(2,846	)		—			—		(5,000	)	$	13.32
Balance at May 25, 2014		2,000,000			149,300		$	13.17		1,215,860		$	8.45

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

				Options Outstanding								Options Exercisable
Range of Exercise Prices				Number of Shares Outstanding		Weighted Average Remaining Contractual Life (in years)		Weighted Average Exercise Price		Aggregate Intrinsic Value		Number of Shares Exercisable		Weighted Average Exercise Price		Aggregate Intrinsic Value
$	5.63	-	$5.63		287,219		3.01	$	5.63	$	1,832,457		287,219	$	5.63	$	1,832,457
$	5.65	-	$6.22		321,085		2.63	$	6.15	$	1,881,142		321,085	$	6.15	$	1,881,142
$	6.35	-	$7.50		230,056		2.63	$	6.76	$	1,207,945		214,612	$	6.77	$	1,125,386
$	8.19	-	$14.30		377,500		5.03	$	13.58	$	136,400		161,694	$	12.94	$	106,400
$	5.63	-	$14.30		1,215,860		3.46	$	8.45	$	5,057,944		984,610	$	7.25	$	4,945,385

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]

	Outstanding Options		Weighted Average Exercise Price		Weighted Average Remaining Contract Term (in years)		Aggregate Intrinsic Value
Vested		984,610	$	7.25		2.88	$	4,945,385
Expected to vest		226,625	$	13.56		5.93		110,308
Total		1,211,235	$	8.43		3.45	$	5,055,693