Stock-Based Compensation Plans (Details) (USD $)	12 Months Ended											6 Months Ended	12 Months Ended						6 Months Ended	12 Months Ended													12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2012 Less than 1.00 [Member]	Jul. 31, 2012 1.00 to 2.00 [Member]	Jul. 31, 2012 2.01 to 6.00 [Member]	Jul. 31, 2012 Stock Options [Member]	Jul. 31, 2011 Stock Options [Member]	Jul. 31, 2010 Stock Options [Member]	Jul. 31, 2012 Stock Options [Member] Minimum [Member]	Jul. 31, 2012 Stock Options [Member] Maximum [Member]	Jul. 31, 2012 Stock Options [Member] Directors [Member]	Jul. 31, 2012 Stock Options [Member] Directors [Member]	Jul. 31, 2011 Stock Options [Member] Directors [Member]	Jul. 31, 2010 Stock Options [Member] Directors [Member]	Jul. 31, 2012 Stock Options [Member] Employees [Member]	Jul. 31, 2011 Stock Options [Member] Employees [Member]	Jul. 31, 2010 Stock Options [Member] Employees [Member]	Jul. 31, 2012 Stock Options [Member] Officers [Member]	Jul. 31, 2012 Stock Options [Member] Officers [Member]	Jul. 31, 2012 Restricted Stock [Member]	Jul. 31, 2011 Restricted Stock [Member]	Jul. 31, 2010 Restricted Stock [Member]	Jul. 31, 2012 Restricted Stock [Member] Advisors [Member]	Jul. 31, 2011 Restricted Stock [Member] Advisors [Member]	Jul. 31, 2010 Restricted Stock [Member] Advisors [Member]	Jul. 31, 2012 Restricted Stock [Member] Employees [Member]	Jul. 31, 2011 Restricted Stock [Member] Employees [Member]	Jul. 31, 2010 Restricted Stock [Member] Employees [Member]	Jul. 31, 2012 2001 Stock Plan [Member]	Sep. 19, 2005 2001 Stock Plan [Member]	Jan. 16, 2001 2001 Stock Plan [Member]	Jul. 31, 2012 2001 Stock Plan [Member] Stock Options [Member]	Jul. 31, 2012 2001 Stock Plan [Member] Restricted Stock [Member]	Jul. 31, 2011 2001 Stock Plan [Member] Restricted Stock [Member]	Jul. 31, 2010 2001 Stock Plan [Member] Restricted Stock [Member]	Jul. 31, 2012 2001 Stock Plan [Member] Restricted Stock [Member] Advisors [Member]	Jul. 31, 2012 2005 Non-Employee Directors' Plan [Member]	Dec. 12, 2008 2005 Non-Employee Directors' Plan [Member]	Sep. 19, 2005 2005 Non-Employee Directors' Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of existing active option plans prior to merger																														2
Number of terminated option plans prior to merger																														2
Shares authorized (in shares)																															1,345,000	345,000							400,000	200,000
Aggregate number of available for future grant (in shares)																														209,440								90,000
Term							10 years
Vesting period										3 years	5 years		12 months
Options, number of shares [Roll Forward]
Options outstanding, beginning of period (in shares)							517,029	576,695	527,735
Granted (in shares)							235,734	108,751	127,500			60,000							175,734
Forfeited (in shares)							(56,133)	(27,000)	(14,770)
Exercised (in shares)							(16,885)	(141,417)	(63,770)
Options outstanding, end of period (in shares)							679,745	517,029	576,695
Options exercisable, end of period (in shares)							449,099
Options, weighted average exercise price [Roll Forward]
Options outstanding, beginning of period (in dollars per share)							$ 2.68	$ 2.08	$ 2.10
Granted (in dollars per share)							$ 6.21	$ 4.43	$ 1.37
Forfeited (in dollars per share)							$ 4.11	$ 3.21	$ 0.94
Exercised (in dollars per share)							$ 2.07	$ 1.49	$ 1.07
Options outstanding, end of period (in dollars per share)							$ 3.80	$ 2.68	$ 2.08
Options exercisable, end of period (in dollars per share)							$ 3.06
Options, weighted average fair value [Roll Forward]
Options outstanding, beginning of period (in dollars per share)							$ 2.16	$ 1.71	$ 1.74
Granted (in dollars per share)							$ 4.75	$ 3.56	$ 1.10
Forfeited (in dollars per share)							$ 3.22	$ 2.71	$ 0.78
Exercised (in dollars per share)							$ 1.99	$ 1.29	$ 0.93
Options outstanding, end of period (in dollars per share)							$ 2.98	$ 2.16	$ 1.71
Options exercisable, end of period (in dollars per share)							$ 2.43
Unvested options, number of shares [Roll Forward]
Unvested options, beginning of period (in shares)							141,188
Granted (in shares)							235,734	108,751	127,500			60,000							175,734
Vested (in shares)							(104,612)
Forfeited (in shares)							(41,664)
Unvested options, period end (in shares)							230,646	141,188
Unvested options, weighted average grant date value [Roll Forward]
Unvested options, beginning of period (in dollars per share)							$ 3.04
Granted (in dollars per share)							$ 6.21
Vested (in dollars per share)							$ 4.74
Forfeited (in dollars per share)							$ 4.54
Unvested options, period end (in dollars per share)							$ 5.24	$ 3.04
Proceeds, related tax benefits and intrinsic value of options exercised [Abstract]
Proceeds of options exercised							$ 35,000	$ 210,000	$ 68,000
Related tax benefit recognized							24,000	125,000	31,000
Intrinsic value of options exercised							34,000	183,000	59,000
Additional information about options outstanding [Abstract]
Number (in shares)							679,745	517,029	576,695
Weighted average exercise price (in dollars per share)							$ 3.80	$ 2.68	$ 2.08
Aggregate intrinsic value							2,023,000
Weighted average contractual term							7 years
Additional information about exercisable options [Abstract]
Number (in shares)							449,099
Weighted average exercise price (in dollars per share)							$ 3.06
Aggregate intrinsic value							1,091,000
Weighted average contractual term							6 years
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shares issued (in shares)	10,000
Compensation expense related to current year													158,000							88,000
Compensation expense for stock options related to previous year													59,000							66,000
Weighted average fair value of options granted and the assumptions used [Abstract]
Expected average risk-free interest rate (in hundredths)							1.92%	3.30%	2.35%
Expected average life							10 years	10 years	10 years
Expected volatility (in hundredths)							71.40%	75.40%	77.80%
Expected dividend yield (in hundredths)							0.00%	0.00%	0.00%
Future compensation cost expected to be recognized [Abstract]
Fiscal 2013	305,000
Fiscal 2014	192,000
Fiscal 2015	183,000
Fiscal 2016	156,000
Fiscal 2017	59,000
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted																																		1,200,000
Weighted average period for recognition of unrecognized compensation cost																																		4 years
Compensation expenses																																	36,000
Restricted stock grants, number of shares [Roll Forward]
Restricted stock awards, beginning of period (in shares)																																		330,807	286,961	112,076
Granted (in shares)																																		202,072	43,846	176,885	5,593
Forfeited (in shares)																																		35,365		2,000
End of period (in shares)																																		497,514	330,807	286,961
Weighted Average Grant Date Fair Value [Roll Forward]
Restricted stock awards, beginning of period (in dollars per share)																																		$ 2.36	$ 2.04	$ 2.95
Granted (in dollars per share)																																		$ 6.37	$ 4.43	$ 1.36
Forfeited (in dollars per share)																																		$ 5.93		$ 3.04
End of period (in dollars per share)																																		$ 3.75	$ 2.36	$ 2.04
Compensation expense associated with stock-based compensation plans [Abstract]
Compensation Expense	764,000	358,000	287,000				371,000	160,000	62,000				217,000	100,000	34,000	154,000	60,000	28,000			393,000	198,000	225,000	36,000	44,000	111,000	357,000	154,000	114,000
Income Tax benefits from Share-based Compensation	$ 225,000	$ 108,000	$ 100,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)					$ 1.00	$ 2.01
Exercise price range, upper range limit (in dollars per share)				$ 1.00	$ 2.00	$ 6.00
Number of outstanding options (in shares)	679,745			45,000	188,893	445,852
Options outstanding, weighted average remaining contractual life	7 years			6 years 6 months	5 years 7 months 6 days	7 years 8 months 12 days
Number of exercisable options (in shares)	449,099			45,000	155,060	249,039
Exercisable options, weighted average remaining contractual life	6 years			6 years 6 months	5 years 1 month 6 days	6 years 4 months 24 days