Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Jan. 31, 2022
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	8 years
Building [Member]
Property, Plant and Equipment, Useful Life (Year)	30 years
Property Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Minimum [Member]
Contract With Customer Performance Period (Year)	3 years
Property, Plant and Equipment, Useful Life (Year)	3 years
Minimum [Member] | Proprietary Rights, Developed Technology [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
Minimum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	8 years
Maximum [Member]
Contract With Customer Performance Period (Year)	12 years
Property, Plant and Equipment, Useful Life (Year)	7 years
Maximum [Member] | Proprietary Rights, Developed Technology [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years
Maximum [Member] | Patents [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years