Stock-Based Compensation and Stockholders' Rights (Restricted Stock Units) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended					3 Months Ended		9 Months Ended
	Oct. 31, 2014 Restricted Stock or Stock Units [Member]	Oct. 31, 2013 Restricted Stock or Stock Units [Member]	Oct. 31, 2014 Restricted Stock or Stock Units [Member]	Oct. 31, 2013 Restricted Stock or Stock Units [Member]	Oct. 31, 2014 2011 Plan [Member] 28626 units of restricted stock issued on 6/24/2014 vesting over 1 year [Member]	Oct. 31, 2014 2011 Plan [Member] 28626 units of restricted stock issued on 6/24/2014 vesting over 1 year [Member]	Oct. 31, 2014 2011 Plan [Member] 490,000 units of restricted stock issued on 6/24/2014 vesting over 5 Year [Member]	Oct. 31, 2014 2011 Plan [Member] 490,000 units of restricted stock issued on 6/24/2014 vesting over 5 Year [Member]	Oct. 31, 2014 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Oct. 31, 2013 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Oct. 31, 2014 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Oct. 31, 2013 2011 Plan [Member] 10000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]	Oct. 31, 2014 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Oct. 31, 2013 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Oct. 31, 2014 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Oct. 31, 2013 2011 Plan [Member] 71,430 units of restricted stock issued on 6/25/2013 vesting over 1yr [Member]	Oct. 31, 2014 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Oct. 31, 2013 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Oct. 31, 2014 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Oct. 31, 2013 2011 Plan [Member] 31,250 units of restricted stock issued on 6/19/2012 vesting over 1 year	Oct. 31, 2014 2011 Plan [Member] 520,000 Grants of Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Oct. 31, 2013 2011 Plan [Member] 520,000 Grants of Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Oct. 31, 2014 2011 Plan [Member] 520,000 Grants of Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Oct. 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]	Oct. 31, 2014 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Oct. 31, 2013 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Oct. 31, 2014 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Oct. 31, 2013 2007 Plan [Member] Grants of Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Oct. 31, 2014 2007 Plan [Member] 40,000 Grants of Restricted Stock, issued 3/21/2012, vesting immediately [Member]	Oct. 31, 2014 2007 Plan [Member] 68,960 Grants of Restricted Stock, issued 6/21/2011, vesting over 1 year [Member]	Oct. 31, 2014 2007 Plan [Member] 56,455 Grants of Restricted Stock, issued 6/8/2010, vesting over 1 year [Member]	Oct. 31, 2014 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Oct. 31, 2013 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Oct. 31, 2014 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Oct. 31, 2013 2007 Plan [Member] 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]	Oct. 31, 2014 2007 Plan [Member] 262,500 Restricted Stock Units, issued 6/19/2007, vesting over 5 years [Member]	Oct. 31, 2014 2007 Plan [Member] Restricted Stock or Stock Units [Member]	Oct. 31, 2013 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		0			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 9 months ended	$ 121,000	$ 129,000	$ 380,000	$ 404,000	$ 18,000	$ 31,000	$ 64,000	$ 107,000	$ 0	$ 0	$ 12,000	$ 0	$ 0	$ 44,000	$ 50,000	$ 74,000	$ 0	$ 0	$ 0	$ 17,000	$ 39,000	$ 39,000	$ 118,000	$ 121,000		$ 0	$ 0	$ 0	$ 41,000				$ 0	$ 46,000	$ 62,000	$ 151,000
Unrecognized compensation at cost	$ 1,621,000		$ 1,621,000		$ 44,000	$ 44,000	$ 1,172,000	$ 1,172,000	$ 0		$ 0		$ 0		$ 0		$ 0		$ 0		$ 405,000		$ 405,000			$ 0		$ 0					$ 0		$ 0
Restricted Stock Units
Granted						28,626		490,000			10,000				71,430				31,250				520,000		0			78,125		40,000	68,960	56,455			382,500		262,500	0	0