Stock-Based Compensation Plans (Schedule Of Stock Options, Activity) (Details) (USD $)	3 Months Ended				6 Months Ended		12 Months Ended
	Jan. 31, 2013	Oct. 31, 2012	Jan. 31, 2012	Oct. 31, 2011	Jan. 31, 2013	Jan. 31, 2012	Jul. 31, 2012	Jul. 31, 2011
2000 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, outstanding, beginning balance	1,002,461	1,099,769	1,173,594	1,236,333	1,099,769	1,236,333	1,236,333
Number of options, granted
Number of options, exercised	(2,000)		(7,750)		(12,800)	(20,950)
Number of options, forfeited	(2,500)		(8,575)		(89,008)	(58,114)
Number of options, outstanding, ending balance	997,961	1,002,461	1,157,269	1,173,594	997,961	1,157,269	1,099,769	1,236,333
Number of options, exercisable	922,374		981,552		922,374	981,552
Weighted average exercise price, options, outstanding, beginning balance	$ 1.40	$ 1.41	$ 1.37	$ 1.36	$ 1.41	$ 1.36	$ 1.36
Weighted average exercise price, options, exercised	$ 0.35		$ 0.65		$ 0.54	$ 0.63
Weighted average exercise price, options, forfeited	$ 0.73		$ 0.85		$ 1.56	$ 1.19
Weighted average exercise price, options, outstanding, ending balance	$ 1.41	$ 1.40	$ 1.38	$ 1.37	$ 1.41	$ 1.38	$ 1.41	$ 1.36
Weighted average exercise price, options, exercisable	$ 1.47		$ 1.50		$ 1.47	$ 1.50
Weighted average remaining contractual period, options outstanding, beginning balance	4 years 8 months 19 days	4 years 11 months 19 days	5 years 7 months 2 days	5 years 9 months 26 days	4 years 8 months 23 days	5 years 3 months 26 days	5 years 22 days	6 years 1 month 6 days
Weighted average remaining contractual period. in years, options, exercisable	4 years 8 months 19 days		5 years 1 month 6 days		4 years 11 months 19 days	5 years 9 months 26 days
Weighted average remaining contractual period, options outstanding, ending balance	4 years 8 months 19 days	4 years 11 months 19 days	5 years 7 months 2 days	5 years 9 months 26 days	4 years 8 months 23 days	5 years 3 months 26 days	5 years 22 days	6 years 1 month 6 days
Aggregate intrinsic value, options outstanding, beginning balance	$ 114,006	$ 105,849	$ 90,116	$ 34,041	$ 105,849	$ 34,041	$ 34,041
Aggregate intrinsic value, options, exercisable	375,251		167,097		375,251	167,097
Aggregate instrinsic value, options outstanding, ending balance	459,617	114,006	298,444	90,116	459,617	298,444	105,849	34,041
2010 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, outstanding, beginning balance	324,167	310,667	117,875	54,250	310,667	54,250	54,250
Number of options, granted	125,668		146,667		145,668	210,667
Number of options, exercised					(3,000)
Number of options, forfeited	(500)		(4,625)		(4,000)	(5,000)
Number of options, outstanding, ending balance	449,335	324,167	259,917	117,875	449,335	259,917	310,667	54,250
Number of options, exercisable	111,460		21,188		111,460	21,188
Weighted average exercise price, options, outstanding, beginning balance	$ 1.10	$ 1.10	$ 0.75	$ 0.67	$ 1.10	$ 0.67	$ 0.67
Weighted average exercise price, options, granted	$ 1.34		$ 1.08		$ 1.29	$ 1.00
Weighted average exercise price, options, exercised					$ 0.66
Weighted average exercise price, options, forfeited	$ 0.65		$ 0.61		$ 0.66	$ 0.61
Weighted average exercise price, options, outstanding, ending balance	$ 1.17	$ 1.10	$ 0.94	$ 0.75	$ 1.17	$ 0.94	$ 1.10	$ 0.67
Weighted average exercise price, options, exercisable	$ 1.09		$ 0.66		$ 1.09	$ 0.66
Weighted average remaining contractual period, options outstanding, beginning balance	9 years 1 month 10 days	9 years 1 month 2 days	9 years 7 months 24 days	9 years 8 months 1 day	8 years 11 months 19 days	9 years 4 months 10 days	9 years 3 months 11 days	9 years 7 months 21 days
Weighted average remaining contractual period. in years, options, exercisable	9 years 1 month 10 days		9 years 1 month 10 days		9 years 1 month 2 days	9 years 8 months 1 day
Weighted average remaining contractual period, options outstanding, ending balance	9 years 1 month 10 days	9 years 1 month 2 days	9 years 7 months 24 days	9 years 8 months 1 day	8 years 11 months 19 days	9 years 4 months 10 days	9 years 3 months 11 days	9 years 7 months 21 days
Aggregate intrinsic value, options outstanding, beginning balance	57,070	41,962	23,096	5,570	41,962	5,570	5,570
Aggregate intrinsic value, options, exercisable	79,585		17,838		79,585	17,838
Aggregate instrinsic value, options outstanding, ending balance	$ 284,393	$ 57,070	$ 145,492	$ 23,096	$ 284,393	$ 145,492	$ 41,962	$ 5,570
Maximum [Member] | 2000 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, options, outstanding, ending balance	$ 2.74				$ 2.74
Maximum [Member] | 2010 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, options, outstanding, ending balance	$ 1.70		$ 0.922		$ 1.70	$ 0.922
Minimum [Member] | 2000 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, options, outstanding, ending balance	$ 0.15				$ 0.15
Minimum [Member] | 2010 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price, options, outstanding, ending balance	$ 0.575		$ 0.575		$ 0.575	$ 0.575