Debt - Components of Long Term Debt (Details) - USD ($) $ in Thousands		Oct. 31, 2015	Jan. 31, 2015
Debt Instrument [Line Items]
Less: unamortized debt issuance costs	[1]	$ (532)	$ (634)
Total long-term debt		27,984	33,506
Current portion of long-term debt		7,332	7,335
Long-term debt, net of current portion		20,652	26,171
Equipment financing notes
Debt Instrument [Line Items]
Long-term debt		14,516	19,390
Term loan, due 2019
Debt Instrument [Line Items]
Long-term debt		$ 14,000	$ 14,750

[1] Includes the reclassification of debt issuance costs of $0.1 million from “Prepaid expenses and other current assets” and $0.5 million from “Other assets” at January 31, 2015 as a result of the Company adopting ASU 2015-03, see Note 1.