Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2023	Jan. 31, 2022
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total		$ (6,917)	$ (12,610)
Other Income [Member]
Employee Retention Credit, Refund Claims	$ 1,000
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	8 years	8 years
Building [Member]
Property, Plant and Equipment, Useful Life (Year)	30 years	30 years
Property Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years	10 years
Minimum [Member]
Contract With Customer Performance Period (Year)			3 years
Property, Plant and Equipment, Useful Life (Year)	3 years	3 years
Minimum [Member] | Proprietary Rights, Developed Technology [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years	10 years
Minimum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	8 years	8 years
Maximum [Member]
Contract With Customer Performance Period (Year)		12 years
Property, Plant and Equipment, Useful Life (Year)	7 years	7 years
Maximum [Member] | Proprietary Rights, Developed Technology [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years	15 years
Maximum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years	10 years
Revision of Prior Period, Error Correction, Adjustment [Member]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total			$ 2,900