CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2017	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,576	$ 6,501
Accounts receivable, net	8	4
Inventories	15	38
Prepaid expenses and other current assets	573	284
Total current assets	2,172	6,827
Property and equipment, net	123	120
Other assets	154	154
Total assets	2,449	7,101
Current liabilities:
Accounts payable	2,006	2,551
Accrued expenses and other current liabilities	1,704	1,176
Total current liabilities	3,710	3,727
Long-term liabilities:
Warrant liability	73	403
Total liabilities	3,783	4,130
Commitments and contingencies (Note 5)
Stockholders’ equity (deficit):
Series A convertible preferred stock, $0.001 par value; 10,000,000 shares authorized; 1,515 issued and outstanding as of October 31, 2017 and January 31, 2017	1,515	1,515
Common stock, $0.001 par value; 450,000,000 shares authorized; 82,233,938 and 67,719,577 shares issued and outstanding as of October 31, 2017 and January 31, 2017, respectively	82	68
Additional paid-in capital	54,559	46,026
Accumulated deficit	(57,490)	(44,638)
Total stockholders' equity (deficit)	(1,334)	2,971
Total liabilities and stockholders' equity (deficit)	$ 2,449	$ 7,101