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Income Taxes - Uncertainty in Income Taxes - Narrative (Detail) - USD ($)	3 Months Ended
	Apr. 28, 2019	Jan. 29, 2017	Apr. 30, 2016	Apr. 29, 2018	Apr. 30, 2017	May 01, 2016
Income Taxes [Line Items]
Unrecognized tax benefits	$ 903,000			$ 844,000	$ 12,245,000	$ 14,897,000
Unrecognized tax benefits that would favorably impact effective income tax rate if recognized	523,000			464,000
Gross amount of interest and penalties due to unrecognized tax benefits	97,000			40,000
Canadian Provincial (Quebec) Returns [Member]
Income Taxes [Line Items]
Income tax examination, final adjustments	4,000
U.S. [Member]
Income Taxes [Line Items]
Income tax examination, final adjustments	0
Earliest Tax Year [Member] | Canadian Provincial (Quebec) Returns [Member]
Income Taxes [Line Items]
Income tax examination, year under examination		2013
Earliest Tax Year [Member] | U.S. [Member]
Income Taxes [Line Items]
Income tax examination, year under examination			2014
Latest Tax Year [Member] | Canadian Provincial (Quebec) Returns [Member]
Income Taxes [Line Items]
Income tax examination, year under examination		2015
Latest Tax Year [Member] | U.S. [Member]
Income Taxes [Line Items]
Income tax examination, year under examination			2016
Non-current Deferred Income Taxes [Member]
Income Taxes [Line Items]
Unrecognized tax benefits	380,000			380,000
Income Taxes Payable - Long-Term [Member]
Income Taxes [Line Items]
Unrecognized tax benefits	$ 523,000			$ 464,000

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Income Taxes [Line Items]

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax settlement.

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