Income Taxes - Additional Information (Detail) - USD ($)	11 Months Ended	12 Months Ended
	Dec. 31, 2017	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Income Taxes [Line Items]
Statutory tax rate	35.00%	21.00%	21.00%	21.00%
Deferred tax liabilities, not recognized		$ 12,400,000
Cumulative undistributed earnings of foreign subsidiaries		85,100,000
Gross deferred tax assets, net of deferred tax liabilities before valuation allowance		27,600,000	$ 23,800,000
Valuation allowance		17,962,000	14,670,000
Unrecognized tax benefits		27,256,000	42,695,000	$ 37,531,000	$ 34,117,000
Unrecognized tax benefits that would impact effective tax rate		21,400,000
Interest expense and penalties related to uncertain tax positions		283,000	358,000	$ 263,000
Noncurrent liabilities related to interest and penalties for uncertain tax positions		1,043,000	760,000
Decreased unrecognized tax benefits		(15,400,000)
Long term income taxes payable, including estimated interest and penalties		$ 9,000,000.0
U.S. federal tax authorities [Member] | Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year		2013
U.S. federal tax authorities [Member] | Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year		2020
U.S. state tax authorities [Member] | Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year		2009
U.S. state tax authorities [Member] | Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year		2020
Foreign tax authorities [Member] | Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year		2015
Foreign tax authorities [Member] | Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year		2020
Other Long-Term Liabilities [Member]
Income Taxes [Line Items]
Income tax liabilities considered as other long term liabilities		$ 7,900,000	$ 7,500,000
California state [Member]
Income Taxes [Line Items]
Net operating loss carryforwards		$ 2,700,000
Net operating loss carryforwards begin to expire in fiscal year		2036
Research and development credit carryforwards		$ 27,100,000
Federal [Member]
Income Taxes [Line Items]
Research and development credit carryforwards		$ 22,400,000
Federal credits begin to expire in fiscal year		2035
CARES Act [Member]
Income Taxes [Line Items]
Net operating loss carrybacks on taxable income		100.00%
Increase in allowable business interest deduction of adjusted taxable income		50.00%	30.00%