Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Income Tax Disclosure [Line Items]
Valuation allowance	$ 14,357,000	$ 11,019,000	$ 8,600,000
Operating loss carryforwards	11,400,000
Unrecognized tax benefits	5,000	186,000	186,000	186,000
Current liabilities for penalties and interest	6,000	284,000
Recognized interest component	$ (278,000)	$ 12,000	$ 12,000
Minimum
Income Tax Disclosure [Line Items]
Operating loss carryforwards expiration period	2030
Minimum | State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Statues of Limitations	3 years
Maximum
Income Tax Disclosure [Line Items]
Operating loss carryforwards expiration period	2032
Maximum | State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Statues of Limitations	5 years