Leases Operating and Financing Lease Obligations (Details) $ in Thousands	Apr. 30, 2019 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 1,353
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,844
Lessee, Operating Lease, Liability, Payments, Due Year Three	679
Lessee, Operating Lease, Liability, Payments, Due Year Four	315
Lessee, Operating Lease, Liability, Payments, Due Year Five	99
Lessee, Operating Lease, Liability, Payments, Due after Year Five	0
Lessee, Operating Lease, Liability, Payments, Due	4,290
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(234)
Operating Lease, Liability	4,056
Finance Lease, Liability, Payments, Remainder of Fiscal Year	284
Finance Lease, Liability, Payments, Due Year Two	184
Finance Lease, Liability, Payments, Due Year Three	101
Finance Lease, Liability, Payments, Due Year Four	36
Finance Lease, Liability, Payments, Due Year Five	6
Finance Lease, Liability, Payments, Due after Year Five	0
Finance Lease, Liability, Payments, Due	611
Finance Lease, Liability, Undiscounted Excess Amount	(41)
Finance Lease, Liability	$ 570