Stock-based Compensation and Stockholders' Equity (Tables)

9 Months Ended

Feb. 27, 2022

Share-based Payment Arrangement [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table summarizes stock-based compensation by income statement line item:

	Three Months Ended				Nine Months Ended
(In thousands)	February 27, 2022		February 28, 2021		February 27, 2022		February 28, 2021
Continuing operations:
Cost of product sales	$	83	$	141	177		$	262
Research and development	51		49		151		175
Selling, general and administrative	488		641		1,575		2,120
Discontinued Operations:
Cost of product sales	—		(34)		25		27
Total stock-based compensation	$	622	$	797	$	1,928	$	2,584