STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended		12 Months Ended	3 Months Ended				0 Months Ended			3 Months Ended
	Apr. 30, 2013 Stock options [Member]	Apr. 30, 2012 Stock options [Member]	Jan. 31, 2013 Stock options [Member]	Apr. 30, 2013 Stock options [Member] Minimum [Member]	Apr. 30, 2012 Stock options [Member] Minimum [Member]	Apr. 30, 2013 Stock options [Member] Maximum [Member]	Apr. 30, 2012 Stock options [Member] Maximum [Member]	Jun. 06, 2012 Stock options [Member] Senior executives [Member]	Apr. 02, 2012 Stock options [Member] Senior executives [Member]	Feb. 27, 2012 Stock options [Member] Senior executives [Member]	Apr. 30, 2013 Stock options [Member] Senior executives [Member]	Apr. 30, 2013 Restricted Stock Units [Member] Nonemployeedirector
Restricted Stock Units [Abstract]
Number of non-employee Directors												5
Number of common share at vesting date for each grantee (in shares)												1
Weighted average fair value as of grant date (in dollars per share)												$ 9.70
Unrecognized compensation expense	$ 702,833											$ 12,501
Restricted stock units transaction activity [Roll Forward]
Non-vested, beginning (in units)												15,465
Granted (in units)												0
Vested (in units)												0
Forfeited (in units)												0
Non-vested, ending (in units)												15,465
Stock options [Abstract]
Vesting rights of awards granted	one-third exercisable one year from the grant date and the remaining two-thirds vesting two and three years from grant date, respectively
Term of awards											10 years
Weighted average grant date fair value per unit (in dollars per unit)								$ 2.91	$ 3.18	$ 2.96	$ 3.14
Assumptions used [Abstract]
Expected term	5 years	5 years
Risk-free interest rate (in hundredths)				0.77%	0.88%	1.68%	2.11%
Expected volatility (in hundredths)				43.00%	43.00%	45.00%	45.00%
Dividend yield (in hundredths)				2.18%	2.18%	2.93%	2.88%
Options [Roll Forward]
Outstanding at beginning of period (in shares)	1,303,192
Granted (in shares)	136,875							3,300	54,625	97,299
Forfeited (in shares)	(32,700)
Exercises (in shares)	(11,201)
Outstanding at end of period (in shares)	1,396,166		1,303,192
Exercisable at end of period (in shares)	1,131,964
Weighted average exercise price [Roll Forward]
Outstanding at beginning of period (in dollars per share)	$ 10.3077
Granted (in dollars per share)	$ 10.2000
Forfeited (in dollars per share)	$ 11.5690
Exercised (in dollars per share)	$ 11.0001
Outstanding at end of period (in dollars per share)	$ 10.2620		$ 10.3077
Exercisable at end of period (in dollars per share)	$ 10.2382
Additional disclosures [Abstract]
Outstanding, average remaining life	5 years 22 days		4 years 9 months 29 days
Exercisable, average remaining life	4 years 1 month 10 days
Outstanding, aggregate intrinsic value	4,381,169
Exercisable, aggregate intrinsic value	3,579,270
Aggregate intrinsic value of options exercised	26,434
Stock option modification cost	$ 250,000