Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Cash flows from operating activities:
Net loss	$ (2,011)	$ (3,623)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	123	191
Depreciation expense		14
Amortization of note discount	388
Change in fair value of warrant liability	(35)	(9)
Changes in assets and liabilities:
Prepaid expenses and other assets	110	66
Accounts payable	61	(178)
Accrued expenses and other liabilities	284	206
Net cash used in operating activities	(1,080)	(3,333)
Cash flows from investing activities:
Proceeds from sale of property and equipment	77
Purchases of property and equipment		(6)
Net cash provided by (used in) investing activities	77	(6)
Cash flows from financing activities:
Proceeds from the issuance of common stock, net of issuance costs		3,554
Proceeds from note payable	625
Proceeds from exercises of stock options		4
Payments on financing lease obligation	(70)	(5)
Net cash provided by financing activities	555	3,553
Net increase (decrease) in cash and cash equivalents	(448)	214
Cash and cash equivalents as of beginning of year	727	3,069
Cash and cash equivalents as of end of year	279	$ 3,283
Non-cash financing activities:
Common stock liability to exchange warrants for common stock	$ 348