Stock-Based Compensation (Details Textual) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended					6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Jan. 31, 2013	Jul. 31, 2013 Stock Option Plan [Member]	Jul. 31, 2013 Stock Plan [Member]	Jun. 30, 2013 Stock Plan [Member] Maximum [Member]	Jun. 30, 2013 Stock Plan [Member] Minimum [Member]	Jul. 31, 2013 Two plans [Member]	Jul. 31, 2013 ISOs [Member]	Jul. 31, 2013 NSOs [Member]	Jul. 31, 2013 Employee Stock Option [Member]
Stock-Based Compensation (Textual) [Abstract]
Number of shares of common stock authorized for grant during the period								1,250,000	500,000	1,717,500
Number of shares of common stock available for award at January 31, 2013							750,500
Expiration dates of stock incentive plans						2011-07	2021-07
Incentive stock option award maximum expiration period											10 years	10 years
Incentive stock option award minimum expiration period											7 years
Period to become exercisable											1 year	1 year
Compensation expense recognize													11 months
Stock-Based Compensation (Additional Textual) [Abstract]
Compensation expense	$ 322,000	$ 332,000	$ 759,000	$ 568,000
Unrecognized compensation cost	558,000		558,000
Intrinsic value of the stock options exercised			546,000	157,000
Intrinsic value of outstanding stock options	860,000		860,000
Intrinsic value of exercisable stock options	$ 1,388,000		$ 1,388,000
Method used for fair value assumption			Black-Scholes option-pricing model
Conversion price for outstanding warrants	7.75		7.75
Shares exercised related to warrants			64,000		160,000
Warrants outstanding					0