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Note 8 - Leases (Details Textual)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2019
USD ($)
Jul. 31, 2019
USD ($)
Operating Lease, Lease Income, Total $ 0.2 $ 0.5
Minimum [Member]    
Lessee, Operating Lease, Renewal Term 1 year 1 year
Lessor, Operating Lease, Renewal Term 180 days 180 days
Maximum [Member]    
Lessee, Operating Lease, Renewal Term 10 years 10 years
Lessor, Operating Lease, Renewal Term 1 year 1 year
Office Space, Equipment, and Automobiles [Member] | Minimum [Member]    
Operating Lease, Remaining Term   1 year
Office Space, Equipment, and Automobiles [Member] | Maximum [Member]    
Operating Lease, Remaining Term   12 years
Assets Leased to Others [Member] | Minimum [Member]    
Lessor, Operating Lease, Term of Contract 180 days 180 days
Assets Leased to Others [Member] | Maximum [Member]    
Lessor, Operating Lease, Term of Contract 1 year 1 year