Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Aug. 26, 2018		Aug. 27, 2017
Product sales	$ 124,668,000		$ 115,781,000
Cost of product sales	108,331,000		96,979,000
Gross profit	16,337,000		18,802,000
Operating costs and expenses:
Research and development	2,833,000		2,719,000
Selling, general and administrative	13,951,000		13,358,000
Total operating costs and expenses	16,784,000		16,077,000
Operating (loss) income	(447,000)		2,725,000
Dividend income	413,000		413,000
Interest income	46,000		31,000
Interest expense	(758,000)	[1]	(404,000)
Other income	1,000,000		900,000
Net income from continuing operations before taxes	254,000		3,665,000
Income tax expense	(64,000)		(1,310,000)
Net income from continuing operations	190,000		2,355,000
Loss from discontinued operations			(203,000)
Income tax benefit			60,000
Loss from discontinued operations, net of tax			(143,000)
Consolidated net income	190,000		2,212,000
Non-controlling interest expense			(66,000)
Net income applicable to common stockholders	$ 190,000		$ 2,146,000
Basic net income (loss) per share:
Income from continuing operations (in dollars per share)	$ 0.01		$ 0.09
Loss from discontinued operations (in dollars per share)			(0.01)
Total basic net income per share (in dollars per share)	0.01		0.08
Income from continuing operations (in dollars per share)	0.01		0.08
Loss from discontinued operations (in dollars per share)
Total diluted net income per share (in dollars per share)	$ 0.01		$ 0.08
Basic (in shares)	27,738		27,506
Diluted (in shares)	28,020		27,858
Other comprehensive loss, net of tax:
Net unrealized losses on interest rate swap contracts (net of tax effect of $27 and $57)	$ (89,000)		$ (103,000)
Other comprehensive loss, net of tax	(89,000)		(103,000)
Total comprehensive income	$ 101,000		$ 2,043,000

[1] Beginning in first quarter of fiscal 2019, the Company began allocating interest expense to its reportable segments in information provided to its CODM to enhance visibility into how financing activities impact the discrete financial results.