Note 3 - Stock-based Compensation (Tables)

9 Months Ended

Feb. 26, 2017

Notes Tables

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended				Nine Months Ended
	February 26, 2017		February 28, 2016		February 26, 2017		February 28, 2016
Options	$	308	$	331	$	907	$	1,021
RSUs		761		553		1,935		1,560
Total stock-based compensation	$	1,069	$	884	$	2,842	$	2,581

	Three Months Ended				Nine Months Ended
	February 26, 2017		February 28, 2016		February 26, 2017		February 28, 2016
Cost of sales	$	124	$	103	$	361	$	301
Research and development		23		22		69		67
Selling, general and administrative		922		759		2,412		2,213
Total stock-based compensation	$	1,069	$	884	$	2,842	$	2,581