Commitments and Contingencies - Schedule of Non-Cancelable Minimum Payments Applicable to Operating and Capital Leases (Details) $ in Thousands	Jan. 31, 2019 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Operating Leases, due in one year	$ 811
Operating Leases, due in two years	464
Operating Leases, due in three years	384
Operating Leases, due in four years	377
Operating Leases, due in five years	374
Operating Leases, due thereafter	2,910
Operating Leases, future minimum payments due	5,320
Capital Leases, future minimum payments due, next twelve months	207
Capital Leases, future minimum payments due in two years	87
Capital Leases, future minimum payments due in three years	21
Capital Leases, future minimum payments due in four years	3
Capital Leases, future minimum payments due in five years	0
Capital Leases, future minimum payments due thereafter	0
Capital Leases, future minimum payments due	$ 318