Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Deferred tax assets:
Net operating loss carryforwards	$ 77,434	$ 82,762
Deferred revenue	3,537	1,683
Other liabilities and accruals	6,852	7,863
Depreciable assets	1,583	1,919
Other reserves	339	352
Gross deferred tax assets	89,745	94,579
Valuation allowance	(89,336)	(94,465)
Total deferred tax assets, net of valuation allowance	409	114
Deferred tax liability:
Goodwill	(101)	(108)
Total deferred tax liability	(101)	(108)
Net deferred tax assets	$ 308	$ 6