CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 7,576	$ 6,501
Accounts receivable, net	7	4
Inventories	10	38
Prepaid expenses and other current assets	388	284
Total current assets	7,981	6,827
Property and equipment, net	109	120
Other assets		154
Total assets	8,090	7,101
Current liabilities:
Accounts payable	1,376	2,551
Accrued expenses and other current liabilities	1,603	1,176
Total current liabilities	2,979	3,727
Long-term liabilities:
Warrant liability	39	403
Total liabilities	3,018	4,130
Commitments and contingencies (Note 5)
Stockholders’ equity:
Series A convertible preferred stock, $0.001 par value; 10,000,000 shares authorized; 0 and 1,515 shares issued and outstanding as of January 31, 2018 and 2017, respectively		1,515
Common stock, $0.001 par value; 450,000,000 shares authorized; 160,062,509 and 67,719,577 shares issued and outstanding as of January 31, 2018 and 2017, respectively	160	68
Additional paid-in capital	66,190	46,026
Accumulated deficit	(61,278)	(44,638)
Total stockholders' equity	5,072	2,971
Total liabilities and stockholders' equity	$ 8,090	$ 7,101

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.