Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited)
Revenues, net	$ 20		$ 29
Cost of goods sold	19		38
Gross margin (deficit)	1		(9)
Operating expenses:
Research and development	1,649	$ 664	3,866	$ 1,827
Sales and marketing	1,270	775	3,658	1,424
General and administrative	930	753	3,074	2,016
Total operating expenses	3,849	2,192	10,598	5,267
Loss from operations	(3,848)	(2,192)	(10,607)	(5,267)
Other income (expense), net		19	(436)	(17)
Loss before income taxes	(3,848)	(2,173)	(11,043)	(5,284)
Provision for income taxes	2		2
Net and comprehensive loss	(3,850)	(2,173)	(11,045)	(5,284)
Accretion on Series A convertible redeemable preferred stock		(39)	(202)	(66)
Deemed dividend on Series A convertible redeemable preferred stock		(51)	(201)	(96)
Net loss available to common stockholders	$ (3,850)	$ (2,263)	$ (11,448)	$ (5,446)
Basic and diluted net loss available to common stockholders per share	$ (0.18)	$ (0.21)	$ (0.71)	$ (0.53)
Shares used in computing basic and diluted net loss per share	21,037,000	10,872,000	16,109,000	10,268,000