CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (400)	$ 135
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	41	26
Provision for doubtful trade accounts receivable	0	3
Imputed interest expense (benefit) on notes payable	72	(42)
Impairment of investment	394	0
Changes in net assets and liabilities:
Trade accounts receivable	(406)	60
Inventories	957	138
Prepaid and other assets	(126)	117
Trade accounts payable	(642)	(340)
Accrued expenses and other	60	(50)
Net cash provided by (used in) operating activities	(50)	47
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(60)	(148)
Net cash used in investing activities	(60)	(148)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of notes payable	(9)	(182)
Proceeds from employee stock purchase plan	13	0
Net cash provided by (used in) financing activities	4	(182)
Net decrease in cash and cash equivalents	(106)	(283)
Cash and cash equivalents, beginning of period	1,778	2,162
Cash and cash equivalents, end of period	$ 1,672	$ 1,879