Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 30, 2022	Jan. 31, 2021	Jan. 26, 2020	Jan. 27, 2019
Non-current deferred tax assets:
Inventory reserve	$ 5,734	$ 4,435
Bad debt reserve	26	23
Foreign tax credits	3,304	1,974
Research credit carryforward	13,498	9,700
NOL carryforward	7,839	7,659
Goodwill and other intangibles	0	690
Leasing deferred assets	4,311	3,573
Payroll and related accruals	11,743	10,248
Share-based compensation	5,256	5,822
Foreign pension deferred	1,412	2,020
Accrued sales reserves	1,012	464
Research and development charges	7,263	4,005
Other deferred assets	2,239	3,253
Valuation allowance	(17,506)	(15,751)	$ (16,189)	$ (18,912)
Total non-current deferred tax assets	46,131	38,115
Non-current deferred tax liabilities:
Goodwill and other intangibles	(1,530)	0
Property, plant and equipment	(6,990)	(6,820)
Repatriation of foreign earnings	(4,709)	(2,538)
Deferred Tax Liabilities, Leasing Deferred Liabilities	(4,139)	(3,415)
Other non-current deferred tax liabilities	(2,093)	(835)
Total non-current deferred tax liabilities	(19,461)	(13,608)
Net deferred tax assets	$ 26,670	$ 24,507