Income Taxes (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2015 USD ($)
Operating Loss Carryforwards
Tax credit carryforward	$ 1,100
Unrecognized Tax Benefits, Period Increase (Decrease)	0
State
Operating Loss Carryforwards
Net tax benefit available	2,000
Federal
Operating Loss Carryforwards
Net tax benefit available	24,700
Portion of net operating loss related to equity-based compensation	$ 5,600