Stock-Based Compensation (Details) (USD $)	3 Months Ended
	Oct. 31, 2013	Jan. 31, 2013	Oct. 31, 2012
Future compensation cost expected to be recognized [Abstract]
Fiscal 2014	$ 225,000
Fiscal 2015	254,000
Fiscal 2016	226,000
Fiscal 2017	88,000
Weighted average fair value of options granted and the assumptions used [Abstract]
Term of U.S. Treasury yield curve used to estimate average risk-free interest rate	10 years
Additional information about options outstanding [Abstract]
Aggregate intrinsic value of stock options	393,000		2,000,000
Additional information about exercisable options [Abstract]
Aggregate intrinsic value of exercisable stock options	375,000		1,200,000
Stock Options [Member]
Options, Shares [Roll Forward]
Options outstanding, beginning of period (in shares)	747,662
Granted (in shares)	0
Forfeited (in shares)	0
Exercised (in shares)	0
Options outstanding, end of period (in shares)	747,662
Options exercisable, end of period (in shares)	545,883
Options, Weighted Average Exercise Price [Roll Forward]
Options outstanding, beginning of period (in dollars per share)	$ 4.17
Granted (in dollars per share)	$ 0
Forfeited (in dollars per share)	$ 0
Exercised (in dollars per share)	$ 0
Options outstanding, end of period (in dollars per share)	$ 4.17
Options exercisable, end of period (in dollars per share)	$ 3.79
Options, Weighted Average Fair Value [Roll Forward]
Options outstanding, beginning of period (in dollars per share)	$ 3.23
Granted (in dollars per share)	$ 0
Forfeited (in dollars per share)	$ 0
Exercised (in dollars per share)	$ 0
Options outstanding, end of period (in dollars per share)	$ 3.23
Options exercisable, end of period (in dollars per share)	$ 2.95
Weighted average fair value of options granted and the assumptions used [Abstract]
Expected average risk-free interest rate (in hundredths)	1.72%
Expected average life	10 years
Expected volatility (in hundredths)	70.50%
Expected dividend yield (in hundredths)	0.00%
Stock Options [Member] | Directors [Member]
Options, Shares [Roll Forward]
Granted (in shares)		60,000
Options, Weighted Average Fair Value [Roll Forward]
Compensation expense related to current year	43,000		68,000
Stock Options [Member] | Officers [Member]
Options, Shares [Roll Forward]
Granted (in shares)		82,227
Options, Weighted Average Fair Value [Roll Forward]
Compensation expense related to current year	17,000
Vesting period		4 years
Compensation expense for stock options related to previous year	48,000		48,000
Restricted Stock [Member]
Restricted Stock Grants, Number of Shares [Roll Forward]
Restricted stock awards, beginning of period (in shares)	405,248
Granted (in shares)	0
Forfeited (in shares)	(2,001)
Vested (in shares)	(51,117)
End of period (in shares)	352,130
Weighted Average Grant Date Fair Value [Roll Forward]
Restricted stock awards, beginning of period (in dollars per share)	$ 3.79
Granted (in dollars per share)	$ 0
Forfeited (in dollars per share)	$ 3.47
Vested (in dollars per share)	$ 2.97
End of period (in dollars per share)	$ 3.91
2001 Stock Plan [Member] | Restricted Stock [Member]
Additional information about exercisable options [Abstract]
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted	$ 928,000
Weighted average period for recognition of unrecognized compensation cost	4 years
2001 Stock Plan [Member] | Restricted Stock [Member] | Minimum [Member]
Options, Weighted Average Fair Value [Roll Forward]
Vesting period	3 years
2001 Stock Plan [Member] | Restricted Stock [Member] | Maximum [Member]
Options, Weighted Average Fair Value [Roll Forward]
Vesting period	5 years
2005 Non-Employee Directors' Plan [Member] | Stock Options [Member] | Directors [Member]
Options, Weighted Average Fair Value [Roll Forward]
Options issued (in shares)	10,000