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Stock Based Compensation (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Stock-Based Compensation (Textual) [Abstract]
Number of shares of common stock available for grant at July 31, 2012	201,500		201,500
Expiration date of warrants			2012-12
Stock Based Compensation (Additional Textual) [Abstract]
Method used for fair value assumption			Black-Scholes option-pricing model
Expected period to recognize compensation expense			11 months
Warrants outstanding at July 31, 2012	96,000		96,000
Price for outstanding warrants exercisable	7.75		7.75
Number of individual to whom warrants issued			3
Shares exercised related to warrants	64,000		64,000
Common stock reserved for issuance plans			2
Stock Plan [Member]
Stock-Based Compensation (Textual) [Abstract]
Number of shares of common stock authorized for grant during the period		500,000		500,000
Number of shares of common stock available for grant at July 31, 2012	0		0
Expiration date of Stock Plan			2021-07
Option Plan [Member]
Stock-Based Compensation (Textual) [Abstract]
Expiration date of Stock Plan			2011-07
Unrecognized compensation cost	$ 1,056,000		$ 1,056,000
Compensation expense	332,000	138,000	568,000	349,000
Intrinsic value of the stock options exercised			157,000
Intrinsic value of outstanding stock options	2,571,000		2,571,000
Market value of the shares amortized			13,000	3,000
Intrinsic value of outstanding stock options			$ 2,842,000
ISOs [Member]
Stock-Based Compensation (Textual) [Abstract]
Incentive stock option award expiration period			10 years
Period of exercisable			1 year
NSOs [Member]
Stock-Based Compensation (Textual) [Abstract]
Incentive stock option award expiration period			10 years
Period of exercisable			1 year
Restricted Stock [Member]
Stock-Based Compensation (Textual) [Abstract]
Restricted stock awarded to employee				5,000
Vesting period			2 years

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