Stock-Based Compensation (Details) (Stock Options, USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2014	Jul. 31, 2013
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Options Outstanding, Number (shares)	48,000	48,000	60,000
Options, Outstanding, Weighted Average Exercise Price	$ 15.27	$ 15.27	$ 14.25
Options, Outstanding, Weighted Average Remaining Contractual Term (years)		2 years 3 months 15 days	2 years 3 months 19 days
Options, Outstanding, Aggregate Intrinsic Value	$ 911	$ 911	$ 1,059
Exercised, Number (shares)	0	(4,000)
Exercised, Weighted Average Exercise Price		$ 12.00
Exercised, Aggregate Intrinsic Value		90
Forfeitures, Number (shares)		(8,000)
Forfeitures, Weighted Average Exercise Price		$ 9.43
Options Exercisable, Number (shares)	48,000	48,000
Exercisable, Weighted Average Exercise Price	$ 15.27	$ 15.27
Exercisable, Weighted Average Remaining Contractual Term (years)		2 years 3 months 15 days
Exercisable, Aggregate Intrinsic Value	$ 911	$ 911