CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Series A Convertible Preferred Stock	Total
Balance Beginning, Amount at Jan. 31, 2016	$ 25	$ 28,261	$ (26,232)		$ 2,054
Balance Beginning, Shares at Jan. 31, 2016	25,208,684
Increase (decrease) in stockholders' deficit
Issuance of common and preferred stock, net of expenses	$ 40	15,283		$ 1,389	16,712
Issuance of common and preferred stock, net of expenses (in shares)	40,453,182			1,515
Issuance of common stock due to exercise of options	$ 1	40			41
Issuance of common stock due to exercise of options (in shares)	131,000
Conversion of convertible notes to common stock	$ 2	1,643			1,645
Conversion of convertible notes to common stock (in shares)	1,926,711
Stock-based compensation expense		1,491			1,491
Deemed dividend for preferred stock		(126)		$ 126
Fair value of warrants		(566)			(566)
Net and comprehensive loss			(18,406)		(18,406)
Balance Ending, Amount at Jan. 31, 2017	$ 68	46,026	(44,638)	$ 1,515	2,971
Balance Ending, Shares at Jan. 31, 2017	67,719,577			1,515
Increase (decrease) in stockholders' deficit
Issuance of common and preferred stock, net of expenses	$ 57	15,992			16,049
Issuance of common and preferred stock, net of expenses (in shares)	57,185,258
Issuance of common stock due to exercise of options		10			10
Issuance of common stock due to exercise of options (in shares)	40,000
Issuance of common stock due to exercise of warrants	$ 31	613			644
Issuance of common stock due to exercise of warrants (in shares)	30,789,103
Conversion of Series A convertible preferred stock to common stock	$ 4	1,511		$ (1,515)	(1,515)
Conversion of Series A convertible preferred stock to common stock	4,328,571			(1,515)
Stock-based compensation expense		1,887			1,887
Deemed dividend for preferred stock				$ 100
Fair value of warrants		151			151
Net and comprehensive loss			(16,640)		(16,640)
Balance Ending, Amount at Jan. 31, 2018	$ 160	$ 66,190	$ (61,278)		$ 5,072
Balance Ending, Shares at Jan. 31, 2018	160,062,509