Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands		Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
Beginning Balance at Jan. 31, 2019		$ 1	$ 79,831	$ (78,534)	$ 1,298
Beginning Balance (in shares) at Jan. 31, 2019	[1]	727,718
Increase (decrease) in stockholders' equity (deficit)
Issuance of common stock due to exercise of options			4		4
Issuance of common stock due to exercise of options (in shares)	[1]	139
Issuance of common stock, net of issuance costs			3,554		3,554
Issuance of common stock, net of issuance costs (in shares)	[1]	145,483
Stock-based compensation expense			191		191
Net loss				(3,623)	(3,623)
Ending Balance at Apr. 30, 2019		$ 1	83,580	(82,157)	1,424
Ending Balance (in shares) at Apr. 30, 2019	[1]	873,340
Beginning Balance at Jan. 31, 2020		$ 1	87,881	(88,221)	(339)
Beginning Balance (in shares) at Jan. 31, 2020	[1]	1,268,991
Increase (decrease) in stockholders' equity (deficit)
Issuance of common stock upon exercise of warrants		$ 1	(1)
Issuance of common stock upon exercise of warrants (in shares)	[1]	183,361
Issuance of common stock in warrant exchange			348		348
Issuance of common stock in warrant exchange (in shares)	[1]	70,833
Stock-based compensation expense			123		123
Net loss				(2,011)	(2,011)
Ending Balance at Apr. 30, 2020		$ 2	$ 88,351	$ (90,232)	$ (1,879)
Ending Balance (in shares) at Apr. 30, 2020	[1]	1,523,185

[1] Note: Share amounts presented above have been adjusted to reflect the impact of a 1-for-12 reverse stock split effected in May 2020 as discussed in Note 1.