Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Jan. 31, 2012	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Summary Of Significant Accounting Policies [Line Items]
Net book value of assets	$ 2,755,000								$ 2,755,000
Change in estimate on depreciation expense									456,000
Change in estimate on earning per share									$ 0.03
Foreign currency gain (losses) included in other expense, net	(58,000)	31,000	(93,000)	37,000	(194,000)	(115,000)	326,000		(83,000)	17,000	(106,000)
Restricted cash	525,000								525,000
Maturity period									90 days
Bad debt expense									21,000
Impairment of long lived assets									0	0
Leasehold improvements, impairment charge											300,000
Reversal of deferred tax asset valuation allowance											12,501,000
Valuation allowance	305,000				409,000				305,000	409,000
Reduced valuation allowance								12,501,000	104,000	(155,000)	12,501,000
Network Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Average useful life of assets									3 years
Reevaluation [Member] | Network Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Average useful life of assets									5 years
State Investment Tax Credits and R&D Credits [Member]
Summary Of Significant Accounting Policies [Line Items]
Valuation allowance					155,000					155,000
Reduced valuation allowance										$ 155,000