COMPUTATION OF NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 1,631	$ 985	$ 2,180	$ 909
Less: Dividends declared	(1,310)	(1,113)	(2,609)	(2,216)
Undistributed net income (loss)	321	(128)	(429)	(1,307)
Net income per share [Abstract]
Dividends declared	1,310	1,113	2,609	2,216
Allocation of undistributed net income (loss)	321	(128)	(429)	(1,307)
Net income attributable to common stock	1,631	985	2,180	909
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	1,392	816	1,860	754
Less: Dividends declared	(1,118)	(922)	(2,225)	(1,835)
Undistributed net income (loss)	274	(106)	(365)	(1,081)
Net income per share [Abstract]
Dividends declared	1,118	922	2,225	1,835
Allocation of undistributed net income (loss)	274	(106)	(365)	(1,081)
Net income attributable to common stock	$ 1,392	$ 816	$ 1,860	$ 754
Weighted average shares of common stock outstanding-basic (in shares)	15,467	12,768	15,367	12,700
Weighted average potential shares of common stock (in shares)	794	737	793	772
Weighted average shares of common stock and potential common shares outstanding-diluted (in shares)	16,261	13,505	16,160	13,472
Basic net income per common share (in dollars per share)	$ 0.09	$ 0.06	$ 0.12	$ 0.06
Diluted net income per common share (in dollars per share)	$ 0.09	$ 0.06	$ 0.12	$ 0.06
Antidilutive securities excluded from computation of net income per share (in shares)	504	312	478	159
Common Class B [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 239	$ 169	$ 320	$ 155
Less: Dividends declared	(192)	(191)	(384)	(381)
Undistributed net income (loss)	47	(22)	(64)	(226)
Net income per share [Abstract]
Dividends declared	192	191	384	381
Allocation of undistributed net income (loss)	47	(22)	(64)	(226)
Net income attributable to common stock	$ 239	$ 169	$ 320	$ 155
Weighted average shares of common stock outstanding-basic (in shares)	3,201	3,181	3,198	3,175
Weighted average potential shares of common stock (in shares)	83	92	84	98
Weighted average shares of common stock and potential common shares outstanding-diluted (in shares)	3,284	3,273	3,282	3,273
Basic net income per common share (in dollars per share)	$ 0.08	$ 0.05	$ 0.10	$ 0.05
Diluted net income per common share (in dollars per share)	$ 0.07	$ 0.05	$ 0.10	$ 0.05
Antidilutive securities excluded from computation of net income per share (in shares)	95	40	78	24