Consolidated Statements of Operations and Retained Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
OPERATIONS:
Net sales	$ 57,429	$ 48,994
Cost of sales	54,984	44,665
Gross profit	2,445	4,329
Selling and administrative expenses	6,148	5,733
Operating loss	(3,703)	(1,404)
Interest expense	(94)	0
Interest income	24	25
Loss before income taxes	(3,773)	(1,379)
Benefit from income taxes	0	0
Net loss	(3,773)	(1,379)
Basic loss per share	$ (0.45)	$ (0.16)
Weighted average number of common shares outstanding	8,391,244	8,391,244
RETAINED EARNINGS:
Balance at beginning of period	94,291	106,155
Net loss	(3,773)	(1,379)
Balance at end of period	$ 90,518	$ 104,776