Leases Balance Sheet Information (Details) - USD ($)	Apr. 30, 2019	Feb. 01, 2019	Jan. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 3,420,000	$ 3,807	$ 0
Operating Lease, Liability, Current	1,689,000
Operating Lease, Liability, Noncurrent	2,367,000
Operating Lease, Liability	4,056,000
Property, plant and equipment, net	105,236,000		$ 106,615,000
Finance Lease, Liability, Current	289,000
Finance Lease, Liability, Noncurrent	281,000
Finance Lease, Liability	570,000
Right of Use Asset, Financing Lease [Member]
Lessee, Lease, Description [Line Items]
Property, plant and equipment	665,000
Accumulated depreciation	(95,000)
Property, plant and equipment, net	$ 570,000