Stock-Based Compensation Plans (Schedule Of Changes In Non-Vested Option Shares) (Details) - 2010 Plan [Member]	6 Months Ended
	Jan. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Non-vested, Beginning Balance	161,498
Number of Options, Granted
Number of Options, Vested	(10,000)
Number of Options, Forfeited	(10,250)
Number of Options, Non-vested, Ending Balance	141,248
Weighted Average Exercise Price, Non-vested, Beginning Balance | $ / shares	$ 2.99
Weighted Average Exercise Price, Vested | $ / shares	3.24
Weighted Average Exercise Price, Forfeited | $ / shares	2.62
Weighted Average Exercise Price, Non-vested, Ending Balance | $ / shares	$ 2.99