Composition of Certain Financial Statement Items - Summary of Accrued and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Apr. 30, 2021	Jan. 31, 2021
Payables and Accruals [Abstract]
Accrued expenses	$ 14,592	$ 18,404
Refundable customer deposits	6,950	6,482
Taxes payable	5,977	5,213
Payroll and related expenses	5,545	7,547
Warranty accruals	3,000	3,000
Operating lease liabilities, current	2,494	2,494
Other liabilities	4,372	4,123
Total Accrued and Other Current Liabilities	$ 42,930	$ 47,162