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Note 8 - Leases (Details Textual)
$ in Millions
3 Months Ended
Apr. 30, 2019
USD ($)
Operating Lease, Lease Income, Total $ 0.2
Minimum [Member]  
Lessee, Operating Lease, Renewal Term 1 year
Lessor, Operating Lease, Renewal Term 90 days
Maximum [Member]  
Lessee, Operating Lease, Renewal Term 6 years
Lessor, Operating Lease, Renewal Term 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 8 years
Assets Leased to Others [Member] | Minimum [Member]  
Lessor, Operating Lease, Term of Contract 90 days
Assets Leased to Others [Member] | Maximum [Member]  
Lessor, Operating Lease, Term of Contract 1 year