Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Cash flows provided by operating activities:
Net loss	$ (1,132)	$ (4,807)	$ (19,157)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	4,077	3,520	2,917
Stock-based compensation expense	1,993	2,276	2,230
Deferred rent expense	255	576	(316)
Deferred income taxes	(90)	(73)	15,131
Net change in operating assets and liabilities:
Accounts receivable	7,779	(4,563)	(188)
Prepaid expenses and other current assets	805	(887)	(609)
Other assets	12	(170)	35
Accounts payable	(349)	1,408	(55)
Accrued expenses	(2,059)	2,158	355
Other liabilities	(298)	(20)	20
Deferred revenue	(8,125)	10,538	(3,436)
Net cash provided by (used in) operating activities	2,868	9,956	(3,073)
Cash flows used in investing activities:
Purchases of property and equipment	(4,065)	(2,250)	(768)
Change in restricted cash		173
Net cash used in investing activities	(4,065)	(2,077)	(768)
Cash flows used in financing activities:
Proceeds from stock option and warrant exercises	890	1,184	757
Acquisition of common stock for tax withholding obligations	(13)
Payments of capital lease obligations	(2,783)	(2,966)	(2,764)
Net cash used in financing activities	(1,906)	(1,782)	(2,007)
Effect of exchange rate changes on cash	6	(233)	(1,120)
Net (decrease) increase in cash and cash equivalents	(3,097)	5,864	(6,968)
Cash and cash equivalents, beginning of period	27,649	21,785	28,753
Cash and cash equivalents, end of period	24,552	27,649	21,785
Supplemental cash flow disclosures:
Cash paid for interest	140	236	342
Cash paid for income taxes	1,691	1,483	1,468
Supplemental disclosure of non-cash investing activities:
Acquisition of equipment through capital leases	62	4,351	1,700
Construction costs funded by landlord tenant improvement allowance		1,051
Increase (decrease) in unpaid purchases of property and equipment	$ 1,586	$ 621	$ (122)