Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 392
Operating cash flows from finance leases	101
Financing cash flows from finance leases	525	$ 518
Lease, Payments	1,018
Right-of-use assets obtained in exchange for operating lease liabilities	3,185	$ 0
Right-of-use asset obtained in exchange for finance lease liabilities	827
Right-of-use asset obtained in exchange for lease liabilities	$ 4,012