Convertible Preferred Stock (Details) - USD ($)		3 Months Ended	9 Months Ended
	Oct. 16, 2019	Oct. 31, 2019	Oct. 31, 2019	Jan. 31, 2019
Class of Stock [Line Items]
Proceeds from issuance of common stock			$ 9,663,000
Redemption of Series A Preferred Stock			5,791,000
Convertible preferred stock, carrying value				$ 8,686,000
Fees paid for redemption of Series A Convertible Preferred Stock			(22,000)
Return from the preferred stockholders		$ 4,894,000	4,894,000
Common Stock
Class of Stock [Line Items]
Shares issued of common stock	9,473,691
Proceeds from issuance of common stock	$ 9,663,000
Shares issued, price per share (in dollars per share)	$ 1.02
Series A Preferred Stock
Class of Stock [Line Items]
Number of shares redeemed	2,895,464
Preferred stock, redemption price per share	$ 2.00
Redemption of Series A Preferred Stock	$ 5,813,000
Convertible preferred stock, carrying value	8,686,000			$ 8,686,000
Redemption of Series A Convertible Preferred Stock			(5,791,000)
Fees paid for redemption of Series A Convertible Preferred Stock	(22,000)		(22,000)
Previously recognized beneficial conversion feature	2,021,000	$ 2,021,000	2,021,000
Return from the preferred stockholders	$ 4,894,000		$ 4,894,000