Note 5 - Stockholders' Equity (Tables)

12 Months Ended

May 29, 2016

Notes Tables

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 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
Granted		(1,118,857	)		324,357		$	13.97		794,500		$	14.20
Awarded/Exercised		—			(79,219	)	$	11.57		(205,419	)	$	6.55
Forfeited		—			(1,667	)	$	14.30		(2,223	)	$	14.30
Plan shares expired		—			—			—		(66,000	)	$	11.32
Balance at May 31, 2015		881,143			392,771		$	14.15		1,736,718		$	11.19
Granted		(443,175	)		177,675		$	12.10		265,500		$	12.04
Awarded/Exercised		—			(32,439	)	$	13.28		(220,717	)	$	6.44
Forfeited		28,000			(11,166	)	$	14.36		(24,473	)	$	14.38
Plan shares expired		—			—			—		(25,554	)	$	9.86
Balance at May 29, 2016		465,968			526,841		$	13.51		1,731,474		$	11.90

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
$5.00	-	$9.00		401,807		1.23	$	5.86	$	2,249,268		401,807	$	5.86	$	2,249,268
$9.01	-	$13.50		312,167		6.35	$	11.86	$	54,784		36,617	$	10.56	$	40,834
$13.51	-	$14.30		364,000		4.41	$	14.13	$	—		308,722	$	14.20	$	—
$14.31	-	$14.39		653,500		6.00	$	14.39	$	—		216,687	$	14.39	$	—
$5.00	-	$14.39		1,731,474		4.62	$	11.90	$	2,304,052		963,833	$	10.63	$	2,290,102

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		963,833	$	10.63		3.38	$	2,290,102
Expected to vest		750,704	$	13.51		6.17		13,517
Total		1,714,537	$	11.89		4.60	$	2,303,619