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Stock Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	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
	Jul. 31, 2013	Jul. 31, 2012	Jan. 31, 2013	Jul. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jul. 31, 2012 Restricted Stock Units (RSUs) [Member]	Jul. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jul. 31, 2012 Restricted Stock Units (RSUs) [Member]	Jul. 31, 2013 2011 Stock Incentive Plan [Member] Restricted Stock Issued On Two Thousand Thirteen Six Twenty Five Vesting Over One Year [Member] [Domain]	Jul. 31, 2012 2011 Stock Incentive Plan [Member] Restricted Stock Issued On Two Thousand Thirteen Six Twenty Five Vesting Over One Year [Member] [Domain]	Jul. 31, 2013 2011 Stock Incentive Plan [Member] Restricted Stock Issued On Two Thousand Thirteen Six Twenty Five Vesting Over One Year [Member] [Domain]	Jul. 31, 2012 2011 Stock Incentive Plan [Member] Restricted Stock Issued On Two Thousand Thirteen Six Twenty Five Vesting Over One Year [Member] [Domain]	Jul. 31, 2013 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2012 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2013 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2012 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2013 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2012 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2013 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2012 2011 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 5 years [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/19/2012, vesting over 1 year [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock, issued 3/21/2012, vesting immediately [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock, issued 3/21/2012, vesting immediately [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/21/2011, vesting over 1 year [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/21/2011, vesting over 1 year [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/21/2011, vesting over 1 year [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/21/2011, vesting over 1 year [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock, issued 6/16/2009, vesting over 5 years [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock Units, issued 6/19/2007, vesting over 5 years [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock Units, issued 6/19/2007, vesting over 5 years [Member]	Jul. 31, 2013 2007 Stock Incentive Plan [Member] Restricted Stock Units, issued 6/19/2007, vesting over 5 years [Member]	Jul. 31, 2012 2007 Stock Incentive Plan [Member] Restricted Stock Units, issued 6/19/2007, vesting over 5 years [Member]
Summary of restricted stock and stock unit awards
Units Granted										83,335				31,250				520,000					78,125		40,000				68,960				382,500				262,500
Allocated Share-based Compensation Expense								$ 30	$ 0	$ 30	$ 0	$ 4	$ 8	$ 17	$ 8	$ 40	$ 28	$ 82	$ 28		$ 11	$ 21	$ 41	$ 21	$ 0	$ 80	$ 0	$ 17	$ 0	$ 67	$ 49	$ 56	$ 105	$ 113	$ 0	$ 24	$ 0	$ 98
Preferred Stock, Shares Outstanding	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number																				0
Unamortized Compensation	901							145		145		0		0		601		601			0		0								155		155
Totals for the period	$ 275	$ 415		$ 134	$ 154	$ 275	$ 415

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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