Leases Balance Sheet Information (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Feb. 01, 2019	Jan. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 2,782	$ 3,807	$ 0
Operating Lease, Liability, Current	1,734
Operating Lease, Liability, Noncurrent	1,507
Operating Lease, Liability	3,241
Property, plant and equipment, net	101,487		$ 106,615
Finance Lease, Liability, Current	331
Finance Lease, Liability, Noncurrent	269
Finance Lease, Liability	600
Right of Use Asset, Financing Lease [Member]
Lessee, Lease, Description [Line Items]
Property, plant and equipment	879
Accumulated depreciation	(279)
Property, plant and equipment, net	$ 600