Stock-Based Compensation and Stockholders' Rights (Restricted Stock Units) (Details) - USD ($)	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Weighted- average fair value of restricted stock units
Aggregate fair value of stock awards vested during the period	$ 902,000	$ 593,000	$ 553,000
Restricted Stock or Stock Units [Member]
Summary of restricted stock and stock unit awards
Granted	87,284	75,174	518,626
Expense for 12 months ended	$ 609,000	$ 493,000	$ 502,000
Unrecognized compensation at cost	$ 862,000
Restricted Stock Units
Outstanding at beginning of year	657,174	812,626	544,430
Granted	87,284	75,174	518,626
Vested	(223,174)	(212,626)	(232,430)
Forfeited	(30,000)	(18,000)	(18,000)
Outstanding at end of year	491,284	657,174	812,626	544,430
Weighted- average fair value of restricted stock units
Outstanding at beginning of year	$ 2.34	$ 2.24	$ 1.87
Granted	3.89	2.76	2.61
Vested	4.04	2.79	2.38
Forfeited	2.61	2.74	2.61
Outstanding at end of year	$ 2.46	$ 2.34	$ 2.24	$ 1.87
2011 Plan [Member] | 51,284 Restricted Stock Units, issued 6/21/2016, vesting over 1 year [Member]
Summary of restricted stock and stock unit awards
Granted	51,284
Maximum term of stock options		1 year
Expense for 12 months ended	$ 133,000	$ 0	$ 0
Unrecognized compensation at cost	$ 66,000
Restricted Stock Units
Granted	51,284
2011 Plan [Member] | 36,000 Restricted Stock Units, issued on 6/21/2016 vesting over 3 years [Member]
Summary of restricted stock and stock unit awards
Granted	36,000
Maximum term of stock options		3 years
Expense for 12 months ended	$ 32,000	$ 0	0
Unrecognized compensation at cost	$ 108,000
Restricted Stock Units
Granted	36,000
2011 Plan [Member] | 48,000 Restricted Stock Units, issued 6/22/2015, vesting over 4 years [Member]
Summary of restricted stock and stock unit awards
Granted	48,000
Maximum term of stock options		4 years
Expense for 12 months ended	$ 32,000	$ 22,000	0
Unrecognized compensation at cost	$ 78,000
Restricted Stock Units
Granted	48,000
2011 Plan [Member] | 27,174 Restricted Stock Units, issued 6/22/2015, vesting over 1 years [Member]
Summary of restricted stock and stock unit awards
Granted	27,174
Maximum term of stock options		1 year
Expense for 12 months ended	$ 25,000	$ 50,000	0
Unrecognized compensation at cost	$ 0
Restricted Stock Units
Granted	27,174
2011 Plan [Member] | 490,000 Restricted Stock Units, issued 6/24/2014, vesting over 5 years [Member]
Summary of restricted stock and stock unit awards
Granted	490,000
Maximum term of stock options		5 years
Expense for 12 months ended	$ 240,000	$ 246,000	171,000
Unrecognized compensation at cost	$ 560,000
Restricted Stock Units
Granted	490,000
2011 Plan [Member] | 28,626 Restricted Stock Units, issued 6/24/2014, vesting over 1 years [Member]
Summary of restricted stock and stock unit awards
Granted	28,626
Maximum term of stock options		1 year
Expense for 12 months ended	$ 0	$ 25,000	49,000
Unrecognized compensation at cost	$ 0
Restricted Stock Units
Granted	28,626
2011 Plan [Member] | 10,000 units of restricted stock issued on 12/3/2013 vesting over 1 year [Member]
Summary of restricted stock and stock unit awards
Granted	10,000
Maximum term of stock options	1 year
Expense for 12 months ended	$ 0	$ 0	13,000
Unrecognized compensation at cost	$ 0
Restricted Stock Units
Granted	10,000
2011 Plan [Member] | 71,430 Restricted Stock Units, issued 6/25/2013, vesting over 1 years [Member]
Summary of restricted stock and stock unit awards
Granted	71,430
Maximum term of stock options		1 year
Expense for 12 months ended	$ 0	$ 0	50,000
Unrecognized compensation at cost	$ 0
Restricted Stock Units
Granted	71,430
2011 Plan [Member] | 520,000 Restricted Stock Units, issued 6/19/2012, vesting over 5 years [Member]
Summary of restricted stock and stock unit awards
Granted	520,000
Maximum term of stock options		5 years
Expense for 12 months ended	$ 147,000	$ 150,000	157,000
Unrecognized compensation at cost	$ 50,000
Restricted Stock Units
Granted	520,000
2011 Plan [Member] | Restricted Stock or Stock Units [Member]
Summary of restricted stock and stock unit awards
Granted	87,284
Restricted Stock Units
Granted	87,284
2007 Plan [Member] | 382,500 Restricted Stock Units, issued 6/16/2009, vesting over 5 years [Member]
Summary of restricted stock and stock unit awards
Granted	382,500
Maximum term of stock options		5 years
Expense for 12 months ended		$ 0	$ 0	$ 62,000
Unrecognized compensation at cost		$ 0
Restricted Stock Units
Granted	382,500