Accrued and Other Current Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Schedule of Accrued Liabilities [Line Items]
Total stock-based compensation	$ 5,800
Liabilities associated with noncancelable internal-use software license at net present value, current	4,388	$ 4,879
Cadence Design Systems, Inc. [Member]
Schedule of Accrued Liabilities [Line Items]
Liabilities associated with noncancelable internal-use software license at net present value, current	3,900
License agreement commitment amount	12,700
Restricted stock units [Member]
Schedule of Accrued Liabilities [Line Items]
Total stock-based compensation	$ 5,800