Quarterly Results of Operations-Unaudited - Quarterly Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended							12 Months Ended			36 Months Ended
	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012	Oct. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 35,616	$ 37,771	$ 37,380	$ 35,552	$ 44,575	$ 36,738	$ 36,626				$ 39,249
Gross profit	17,865	20,888	21,362	19,084	26,066	16,860	20,505	79,199	83,291	93,285	19,860
Operating expenses	18,742	20,359	20,827	20,900	21,127	24,369	21,676	80,828	88,637	94,955	21,465
Net (loss) income from continuing operations	(1,348)	798	343	(2,020)	5,923	(8,098)	(287)				(337)
Net (loss) income from discontinued operations	(59)	(221)	(558)	35	613	2,100	(19,290)	(803)	(16,366)	(611)	211
Net (loss) income	$ (1,407)	$ 577	$ (215)	$ (1,985)	$ 6,536	$ (5,998)	$ (19,577)	$ (3,030)	$ (19,165)	$ (4,014)	$ (126)
Net (loss) income per share from continuing operations:
Basic (loss) income per share	$ (0.04)	$ 0.02	$ 0.01	$ (0.06)	$ 0.18	$ (0.25)	$ (0.01)	$ (0.07)	$ (0.09)	$ (0.11)	$ (0.01)
Diluted (loss) income per share	$ (0.04)	$ 0.02	$ 0.01	$ (0.06)	$ 0.18	$ (0.25)	$ (0.01)	$ (0.07)	$ (0.09)	$ (0.11)	$ (0.01)
(Loss) income per share from discontinued operations:
Basic (loss) income per share	$ 0.00	$ 0.00	$ (0.02)	$ 0.00	$ 0.02	$ 0.07	$ (0.59)	$ (0.02)	$ (0.50)	$ (0.02)	$ 0.01
Diluted (loss) income per share	$ 0.00	$ 0.00	$ (0.02)	$ 0.00	$ 0.02	$ 0.07	$ (0.59)	$ (0.02)	$ (0.50)	$ (0.02)	$ 0.01
(Loss) income per share
Basic (loss) income per share	$ (0.04)	$ 0.02	$ (0.01)	$ (0.06)	$ 0.20	$ (0.18)	$ (0.60)	$ (0.09)	$ (0.59)	$ (0.13)	$ 0.00
Diluted (loss) income per share	$ (0.04)	$ 0.02	$ (0.01)	$ (0.06)	$ 0.20	$ (0.18)	$ (0.60)	$ (0.09)	$ (0.59)	$ (0.13)	$ 0.00