COMPUTATION OF NET (LOSS) INCOME PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income	$ (1,263)	$ 1,844
Less: Dividends declared	(1,088)	(1,078)
Undistributed net (loss) income	(2,351)	766
Net (loss) income per share [Abstract]
Dividends declared	1,088	1,078
Allocation of undistributed net (loss) income	(2,351)	766
Net (loss) income	(1,263)	1,844
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income	(1,043)	1,524
Less: Dividends declared	(899)	(890)
Undistributed net (loss) income	(1,942)	634
Net (loss) income per share [Abstract]
Dividends declared	899	890
Allocation of undistributed net (loss) income	(1,942)	634
Net (loss) income	(1,043)	1,524
Weighted average shares of common stock outstanding-basic (in shares)	12,429	12,693
Weighted average potential shares of common stock (in shares)	0	519
Weighted average shares of common stock and potential common shares outstanding-diluted (in shares)	12,429	13,212
Basic net (loss) income per common share (in dollars per share)	$ (0.08)	$ 0.12
Diluted net (loss) income per common share (in dollars per share)	$ (0.08)	$ 0.12
Antidilutive securities excluded from computation of earnings per share (in shares)	2,804	2,086
Common Class B [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net (loss) income	(220)	320
Less: Dividends declared	(189)	(188)
Undistributed net (loss) income	(409)	132
Net (loss) income per share [Abstract]
Dividends declared	189	188
Allocation of undistributed net (loss) income	(409)	132
Net (loss) income	$ (220)	$ 320
Weighted average shares of common stock outstanding-basic (in shares)	3,145	3,168
Weighted average potential shares of common stock (in shares)	0	119
Weighted average shares of common stock and potential common shares outstanding-diluted (in shares)	3,145	3,287
Basic net (loss) income per common share (in dollars per share)	$ (0.07)	$ 0.10
Diluted net (loss) income per common share (in dollars per share)	$ (0.07)	$ 0.10
Antidilutive securities excluded from computation of earnings per share (in shares)	456	377