Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Accounts receivable-trade, Allowances	$ 139	$ 0
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	48,448,608	47,688,410
Common stock, shares outstanding	48,448,608	47,688,410