Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning of fiscal year	$ 0	$ 121
Additions for tax positions of prior years	0	0
Reductions for tax positions of prior years	0	0
Reductions attributable to lapse of statute of limitations	0	(121)
End of fiscal year	$ 0	$ 0