Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Jan. 31, 2013
Deferred Tax Assets:
Accruals and reserves	$ 2,357	$ 906
Net operating loss carryforward	1,015
State income taxes	535	395
Tax credit carryforward	750	203
Gross Deferred Tax Assets	4,657	1,504
Valuation Allowance	(716)	(204)
Total Deferred Tax Assets	3,941	1,300
Deferred Tax Liabilities:
Fixed Assets	(74)	(235)
Intangibles	(2,448)
Expensed software	(606)	(337)
Other	(436)
Total Deferred Tax Liabilities	(3,564)	(572)
Net Deferred Tax Assets	$ 377	$ 728