Note 2 - Basis of Presentation and Immaterial Correction of Comprehensive Loss (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	$ (1,620,000)	$ (2,683,000)	$ (4,042,000)	$ (6,610,000)
Revision of Prior Period, Error Correction, Adjustment [Member]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total		$ (682,000)		$ (1,300,000)	$ (2,900,000)	$ (2,300,000)