Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Oct. 31, 2014	Oct. 31, 2013
Income Statement [Abstract]
Net sales	$ 246,621	$ 234,668
Cost of sales	187,231	176,735
Gross profit	59,390	57,933
Operating expenses:
Selling, general and administrative	28,582	56,556
Advertising	11,816	10,658
Loss on warrant liability	0	16,976
Total operating expenses	40,398	84,190
Income (loss) from operations	18,992	(26,257)
Interest expense, net	10,236	14,848
Income (loss) before income taxes	8,756	(41,105)
Income taxes	1,062	1,048
Net income (loss)	$ 7,694	$ (42,153)
Income (loss) per share:
Basic (in dollars per share)	$ 0.25	$ (1.92)
Diluted (in dollars per share)	$ 0.24	$ (1.92)
Shares used to compute income (loss) per share:
Basic (in dollars per share)	31,042	21,954
Diluted (in dollars per share)	31,468	21,954