Stock-Based Compensation Plans (Schedule Of Stock Options, Activity) (Details) (USD $)	3 Months Ended				6 Months Ended		12 Months Ended
	Jan. 31, 2015	Oct. 31, 2014	Jan. 31, 2014	Oct. 31, 2013	Jan. 31, 2015	Jan. 31, 2014	Jul. 31, 2014	Jul. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining contractual period, options outstanding, beginning balance	3 years 2 months 19 days	3 years 3 months 22 days	3 years 2 months 16 days	3 years 11 months 5 days
Weighted average remaining contractual period, options outstanding, ending balance	3 years 2 months 19 days	3 years 3 months 22 days	3 years 2 months 16 days	3 years 11 months 5 days
Weighted average remaining contractual period. in years, options, exercisable	3 years 2 months 19 days		3 years 2 months 12 days
2000 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, outstanding, beginning balance	508,125	611,300	963,661	986,786	611,300	986,786	986,786
Number of options, exercised	(34,375)		(127,500)		(137,350)	(147,500)
Number of options, forfeited	(750)		(14,087)		(950)	(17,212)
Number of options, outstanding, ending balance	473,000		822,074		473,000	822,074	611,300	986,786
Number of options, exercisable	473,000		820,700		473,000	820,700
Weighted average exercise price, options, outstanding, beginning balance	$ 1.57	$ 1.60	$ 1.43	$ 1.41	$ 1.60	$ 1.41	$ 1.41
Weighted average exercise price, options, exercised	$ 2.23		$ 0.74		$ 1.89	$ 0.74
Weighted average exercise price, options, forfeited	$ 1.24		$ 0.70		$ 1.26	$ 0.75
Weighted average exercise price, options, outstanding, ending balance	$ 1.52		$ 1.55		$ 1.52	$ 1.55	$ 1.60	$ 1.41
Weighted average exercise price, options, exercisable	$ 1.52		$ 1.55		$ 1.52	$ 1.55
Weighted average remaining contractual period, options outstanding, beginning balance					3 years 2 months 19 days	3 years 2 months 16 days	3 years 2 months 5 days	4 years 2 months 19 days
Weighted average remaining contractual period, options outstanding, ending balance					3 years 2 months 19 days	3 years 2 months 16 days	3 years 2 months 5 days	4 years 2 months 19 days
Weighted average remaining contractual period. in years, options, exercisable					3 years 2 months 19 days	3 years 2 months 12 days
Aggregate intrinsic value, options outstanding, beginning balance	$ 960,733	$ 834,752	$ 1,773,485	$ 1,564,296	$ 834,752	$ 1,564,296	$ 1,564,296
Aggregate intrinsic value, options outstanding, ending balance	912,198		1,514,709		912,198	1,514,709	834,752	1,564,296
Aggregate intrinsic value, options, exercisable	912,198		1,510,836		912,198	1,510,836
2010 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, outstanding, beginning balance	485,876	482,542	385,585	394,460	482,542	394,460	394,460
Number of options, granted	5,000		100,000		50,000	100,000
Number of options, exercised	(22,375)		(45,000)		(38,375)	(45,000)
Number of options, forfeited	(14,000)		(14,500)		(39,666)	(23,375)
Number of options, outstanding, ending balance	454,501	485,876	426,085	385,585	454,501	426,085	482,542	394,460
Number of options, exercisable	203,752		178,440		203,752	178,440
Weighted average exercise price, options, outstanding, beginning balance	$ 2.24	$ 2.16	$ 1.24	$ 1.25	$ 2.16	$ 1.25	$ 1.25
Weighted average exercise price, options, granted	$ 3.54		$ 3.25		$ 3.24	$ 3.25
Weighted average exercise price, options, exercised	$ 1.83		$ 0.88		$ 1.52	$ 0.88
Weighted average exercise price, options, forfeited	$ 2.15		$ 0.89		$ 2.84	$ 1.10
Weighted average exercise price, options, outstanding, ending balance	$ 2.27	$ 2.24	$ 1.76	$ 1.24	$ 2.27	$ 1.76	$ 2.16	$ 1.25
Weighted average exercise price, options, exercisable	$ 1.72		$ 1.29		$ 1.72	$ 1.29
Weighted average remaining contractual period, options outstanding, beginning balance	8 years 1 month 24 days	8 years 1 month 28 days	8 years 8 months 1 day	8 years 5 months 12 days		8 years 8 months 1 day	8 years 6 months 22 days	8 years 8 months 12 days
Weighted average remaining contractual period, options outstanding, ending balance	8 years 1 month 24 days	8 years 1 month 28 days	8 years 8 months 1 day	8 years 5 months 12 days		8 years 8 months 1 day	8 years 6 months 22 days	8 years 8 months 12 days
Weighted average remaining contractual period. in years, options, exercisable	7 years 4 months 24 days		8 years 26 days	8 years 26 days
Aggregate intrinsic value, options outstanding, beginning balance	593,984	453,057	781,652	691,485	453,057	691,485	691,485
Aggregate intrinsic value, options outstanding, ending balance	534,732	593,984	693,641	781,652	534,732	693,641	453,057	691,485
Aggregate intrinsic value, options, exercisable	$ 351,925		$ 374,908		$ 351,925	$ 374,908