Stock-Based Compensation and Stockholders' Rights (Restricted Stock Units) (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended		3 Months Ended					6 Months Ended		3 Months Ended		12 Months Ended
	Jul. 31, 2014 Restricted Stock or Stock Units [Member]	Jul. 31, 2013 Restricted Stock or Stock Units [Member]	Jul. 31, 2014 Restricted Stock or Stock Units [Member]	Jul. 31, 2013 Restricted Stock or Stock Units [Member]	Jul. 31, 2014 2011 Plan [Member] 28626 units of restricted stock issued on 6/24/2014 vesting over 1 year [Member]	Jul. 31, 2014 2011 Plan [Member] 28626 units of restricted stock issued on 6/24/2014 vesting over 1 year [Member]	Jul. 31, 2014 2011 Plan [Member] 490,000 units of restricted stock issued on 6/24/2014 vesting over 5 Year [Member]	Jul. 31, 2014 2011 Plan [Member] 490,000 units of restricted stock issued on 6/24/2014 vesting over 5 Year [Member]	Jul. 31, 2014 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Jul. 31, 2013 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Jul. 31, 2014 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Jul. 31, 2013 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Jul. 31, 2014 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Jul. 31, 2013 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Jul. 31, 2014 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Jul. 31, 2013 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Jul. 31, 2014 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Jul. 31, 2013 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Jul. 31, 2014 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Jul. 31, 2013 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Jul. 31, 2014 2011 Plan [Member] 520,000 Grants of Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2013 2011 Plan [Member] 520,000 Grants of Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2014 2011 Plan [Member] 520,000 Grants of Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2013 2011 Plan [Member] 520,000 Grants of Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2014 2011 Plan [Member] Restricted Stock or Stock Units [Member]	Jul. 31, 2014 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2013 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2014 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2013 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2014 2007 Plan [Member] 40,000 Grants of Restricted Stock, issued 3/21/2012, vesting immediately [Member]	Jul. 31, 2014 2007 Plan [Member] 68,960 Grants of Restricted Stock, issued 6/21/2011, vesting over 1 year [Member]	Jul. 31, 2014 2007 Plan [Member] 56,455 Grants of Restricted Stock, issued 6/8/2010, vesting over 1 year [Member]	Jul. 31, 2014 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2013 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2014 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2013 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2014 2007 Plan [Member] 262,500 Restricted Stock Units, issued 6/19/2007, vesting over 5 years [Member]	Jul. 31, 2014 2007 Plan [Member] Restricted Stock or Stock Units [Member]	Jan. 31, 2014 2007 Plan [Member] Restricted Stock or Stock Units [Member]
Summary of restricted stock and stock unit awards
Granted					28,626		490,000		10,000				71,430				31,250				520,000				518,626	78,125				40,000	68,960	56,455	382,500				262,500	0	0
Maximum term of stock options					1 year		5 years		1 year				1 year				1 year				5 years					1 year					1 year	1 year	5 years				5 years
Expense for 3 months and 6 months ended	$ 129,000	$ 134,000	$ 259,000	$ 275,000	$ 13,000	$ 13,000	$ 43,000	$ 43,000	$ 6,000	$ 0	$ 12,000	$ 0	$ 13,000	$ 30,000	$ 50,000	$ 30,000	$ 0	$ 4,000	$ 0	$ 17,000	$ 39,000	$ 40,000	$ 79,000	$ 82,000		$ 0	$ 11,000	$ 0	$ 41,000				$ 15,000	$ 49,000	$ 62,000	$ 105,000
Unrecognized compensation at cost	$ 1,743,000		$ 1,743,000		$ 62,000	$ 62,000	$ 1,237,000	$ 1,237,000	$ 0		$ 0		$ 0		$ 0		$ 0		$ 0		$ 444,000		$ 444,000			$ 0		$ 0					$ 0		$ 0
Restricted Stock Units
Granted					28,626		490,000		10,000				71,430				31,250				520,000				518,626	78,125				40,000	68,960	56,455	382,500				262,500	0	0