Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012		Jul. 31, 2011
Discontinued Operations [Abstract]
Revenues
Cost of sales
Operating expenses
Operating loss
Gain (loss) on sale			40
Income tax benefit (provision)		[1]	(15)	[1]
Net gain (loss)			$ 25

[1] Net of recorded deferred income tax asset valuation allowance