Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2016	Mar. 01, 2015	Feb. 28, 2016	Mar. 01, 2015
Product sales	$ 129,990,000	$ 138,530,000	$ 405,786,000	$ 404,809,000
Cost of product sales	117,059,000	121,645,000	357,613,000	358,071,000
Gross profit	12,931,000	16,885,000	48,173,000	46,738,000
Operating costs and expenses:
Research and development	1,895,000	1,755,000	5,413,000	5,375,000
Selling, general and administrative	10,659,000	$ 10,298,000	35,638,000	$ 29,106,000
Impairment of GreenLine tradename	34,000,000		34,000,000
Total operating costs and expenses	46,554,000	$ 12,053,000	75,051,000	$ 34,481,000
Operating (loss) income	(33,623,000)	4,832,000	(26,878,000)	12,257,000
Dividend income	413,000	413,000	1,238,000	1,015,000
Interest income	17,000	85,000	64,000	269,000
Interest expense	$ (484,000)	(510,000)	(1,425,000)	(1,365,000)
Other income		1,307,000	1,000,000	2,707,000
Net (loss) income before taxes	$ (33,677,000)	6,127,000	(26,001,000)	14,883,000
Income tax benefit (expense)	12,510,000	(2,324,000)	9,750,000	(5,409,000)
Consolidated net (loss) income	(21,167,000)	3,803,000	(16,251,000)	9,474,000
Non-controlling interest	(23,000)	(31,000)	(119,000)	(126,000)
Net (loss) income and comprehensive (loss) income applicable to common stockholders	$ (21,190,000)	$ 3,772,000	$ (16,370,000)	$ 9,348,000
Basic net (loss) income per share (in dollars per share)	$ (0.78)	$ 0.14	$ (0.61)	$ 0.35
Diluted net (loss) income per share (in dollars per share)	$ (0.78)	$ 0.14	$ (0.61)	$ 0.34
Shares used in per share computation
Basic (in shares)	27,054	26,886	27,026	26,863
Diluted (in shares)	27,054	27,363	27,026	27,314