Leases - Lease Liability Maturity Schedule (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Feb. 01, 2020
Operating
2021 (remaining nine months)	$ 1,284
2022	793
2023	684
2024	365
Total future minimum lease payments	3,126
Less: interest	(134)
Present value of lease liabilities	2,992	$ 2,928
Finance
2021 (remaining nine months)	2,145
2022	1,907
2023	861
2024	73
Total future minimum lease payments	4,986
Less: interest	(386)
Present value of lease liabilities	$ 4,600