CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 8,494	$ 4,483
Short-term investments	41,251	47,307
Accounts receivable, net	3,547	2,858
Inventories	6,394	6,079
Other current assets	3,429	4,397
Total current assets	63,115	65,124
Property and equipment, net	4,811	4,732
Intangible assets, net	3,231	1,292
Goodwill	3,803	1,947
Other assets	1,161	336
Total assets	76,121	73,431
Current liabilities:
Accounts payable	8,094	5,453
Accrued expenses	16,192	14,777
Deferred revenue	14,629	15,556
Total current liabilities	38,915	35,786
Other liabilities	966	577
Total liabilities	39,881	36,363
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock $0.0001 par value: 10 million shares authorized; none issued and outstanding
Common stock $0.0001 par value: 100 million shares authorized; 19.5 million and 19.1 million shares issued and outstanding, respectively	2	2
Additional paid-in capital	131,231	128,081
Accumulated other comprehensive loss	(85)	(84)
Accumulated deficit	(94,908)	(90,931)
Total stockholders’ equity	36,240	37,068
Total liabilities and stockholders’ equity	$ 76,121	$ 73,431

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.