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Note 9 - Intangible Assets (Details Textual) - USD ($)
$ in Thousands
Jan. 31, 2021
Jan. 31, 2020
Finite-Lived Intangible Assets, Net, Ending Balance $ 239,992 $ 256,956
Finite-Lived Intangible Asset, Expected Amortization, Year One 53,900  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 46,400  
Finite-Lived Intangible Asset, Expected Amortization, Year Three 34,300  
Finite-Lived Intangible Asset, Expected Amortization, Year Four 31,500  
Finite-Lived Intangible Asset, Expected Amortization, Year Five 27,200  
Finite-Lived Intangible Asset, Expected Amortization, after Year Five $ 46,700