COMPUTATION OF NET INCOME (LOSS) PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 985	$ 1,254	$ 909	$ (9)
Less: Dividends declared	(1,113)	(1,089)	(2,216)	(2,177)
Undistributed net (loss) income	(128)	165	(1,307)	(2,186)
Net income per share [Abstract]
Dividends declared	1,113	1,089	2,216	2,177
Undistributed net (loss) income	(128)	165	(1,307)	(2,186)
Net income (loss) attributable to common stock	985	1,254	909	(9)
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	816	1,036	754	(6)
Less: Dividends declared	(922)	(900)	(1,835)	(1,799)
Undistributed net (loss) income	(106)	136	(1,081)	(1,805)
Net income per share [Abstract]
Dividends declared	922	900	1,835	1,799
Undistributed net (loss) income	(106)	136	(1,081)	(1,805)
Net income (loss) attributable to common stock	816	1,036	754	(6)
Weighted average shares of common stock outstanding-basic (in shares)	12,768	12,473	12,700	12,451
Weighted average potential shares of common stock (in shares)	737	430	772	0
Weighted average shares of common stock and potential common shares outstanding-diluted (in shares)	13,505	12,903	13,472	12,451
Basic net income (loss) per common share (in dollars per share)	$ 0.06	$ 0.08	$ 0.06	$ 0
Diluted net income (loss) per common share (in dollars per share)	$ 0.06	$ 0.08	$ 0.06	$ 0
Antidilutive securities excluded from computation of net income (loss) per share (in shares)	312	1,177	159	2,915
Common Class B [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	169	218	155	(3)
Less: Dividends declared	(191)	(189)	(381)	(378)
Undistributed net (loss) income	(22)	29	(226)	(381)
Net income per share [Abstract]
Dividends declared	191	189	381	378
Undistributed net (loss) income	(22)	29	(226)	(381)
Net income (loss) attributable to common stock	$ 169	$ 218	$ 155	$ (3)
Weighted average shares of common stock outstanding-basic (in shares)	3,181	3,145	3,175	3,145
Weighted average potential shares of common stock (in shares)	92	86	98	0
Weighted average shares of common stock and potential common shares outstanding-diluted (in shares)	3,273	3,231	3,273	3,145
Basic net income (loss) per common share (in dollars per share)	$ 0.05	$ 0.07	$ 0.05	$ 0
Diluted net income (loss) per common share (in dollars per share)	$ 0.05	$ 0.07	$ 0.05	$ 0
Antidilutive securities excluded from computation of net income (loss) per share (in shares)	40	187	24	456