Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Cash flows from operating activities:
Net loss	$ (16,106)	$ (9,343)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	1,176	968
Provision for bad debts	79	21
Stock-based compensation	4,062	1,598
Change in fair value of convertible preferred stock warrant liability	491	44
Deferred income taxes	(13)	(7)
Amortization of deferred financing costs	34	0
Changes in operating assets and liabilities:
Restricted cash	(2)	5,789
Accounts receivable	8,537	10,475
Prepaid expenses and other assets	(1,277)	(1,063)
Deferred commissions	(365)	(405)
Other long term assets	(220)	(2)
Accounts payable, accrued expenses and other liabilities	(4,994)	(2,641)
Deferred revenue	243	2,222
Deferred rent	7	(214)
Other long term liabilities	2	9
Net cash (used in) provided by operating activities	(8,346)	7,451
Cash flows from investing activities:
Capital expenditures	(1,078)	(829)
Net cash used in investing activities	(1,078)	(829)
Cash flows from financing activities:
Proceeds from initial public offering, net of underwriting discounts and commissions	123,527	0
Payments of deferred offering costs	(1,969)	0
Proceeds from exercise of stock options	2,140	486
Repayments on Revolving Line	(5,000)	0
Payments of deferred financing costs	0	(85)
Net cash provided by financing activities	118,698	401
Effect of exchange rate changes on cash and cash equivalents	41	4
Net increase in cash and cash equivalents	109,315	7,027
Cash and cash equivalents at beginning of period	24,420	30,028
Cash and cash equivalents at end of period	133,735	37,055
Supplemental disclosures of non-cash investing and financing information:
Purchase of capital expenditures in accounts payable, accrued expenses and other current liabilities	231	138
Deferred offering costs in accounts payable, accrued expenses and other current liabilities	2,294	0
Conversion of convertible preferred stock to common stock	120,615	0
Conversion of convertible preferred stock warrants to common stock warrants	1,435	0
Cash paid on interest	71	0
Cash paid on income taxes	$ 2	$ 0