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Note 9 - Leases (Details Textual)
$ in Millions
12 Months Ended
Jan. 31, 2020
USD ($)
Operating Lease, Lease Income, Total $ 1
Minimum [Member]  
Lessee, Operating Lease, Renewal Term (Year) 1 year
Lessor, Operating Lease, Renewal Term (Year) 3 years
Maximum [Member]  
Lessee, Operating Lease, Renewal Term (Year) 10 years
Lessor, Operating Lease, Renewal Term (Year) 1 year
Office Space, Equipment, and Automobiles [Member] | Minimum [Member]  
Operating Lease, Remaining Term (Year) 1 year
Office Space, Equipment, and Automobiles [Member] | Maximum [Member]  
Operating Lease, Remaining Term (Year) 11 years
Assets Leased to Others [Member] | Minimum [Member]  
Lessor, Operating Lease, Term of Contract (Year) 3 years
Assets Leased to Others [Member] | Maximum [Member]  
Lessor, Operating Lease, Term of Contract (Year) 1 year