Acquisition (Details) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 05, 2018 USD ($) Payments	Aug. 03, 2019 USD ($) $ / shares	Aug. 04, 2018 USD ($)	Aug. 03, 2019 USD ($) $ / shares	Aug. 04, 2018 USD ($)	Feb. 02, 2019 USD ($)
Acquisition [Abstract]
Net sales		$ 252,440	$ 211,123	$ 595,735	$ 485,830
Current assets:
Goodwill		19,661		19,661		$ 23,133
Pro Forma - Unaudited [Abstract]
Net sales		254,592		588,588
Net (loss) income		$ (2,805)		$ 24,701
Basic earnings per share (in dollars per share) | $ / shares		$ (0.15)		$ 1.31
Diluted earnings per share (in dollars per share) | $ / shares		$ (0.15)		$ 1.29
Adjustments [Member]
Current liabilities:
Fair value of contingent earnout		$ 3,200		$ 3,200
City Gear [Member]
Acquisition [Abstract]
Purchase price, cash payable	$ 88,000
Number of contingent payments | Payments	2
Maximum amount of contingent payments	$ 25,000
Acquisition related expenses		7,600		9,200
Intangible asset for favorable leases	1,400
Liability for unfavorable leases	3,400
Net sales				101,500
Amortization of step-up inventory				1,000
Current assets:
Receivables		3,732		3,732
Inventories		44,807		44,807
Prepaid expense, other current and intangible assets		2,689		2,689
Total current assets		51,228		51,228
Goodwill		19,661		19,661
Property and equipment		16,530		16,530
Long-term intangible assets		33,503		33,503
Deposits and other assets		567		567
Deferred tax asset		638		638
Total assets		122,127		122,127
Current liabilities:
Accounts payable		23,615		23,615
Other accrued expenses and intangible liabilities		3,526		3,526
Total current liabilities		27,141		27,141
Other long-term liabilities and intangible liabilities		3,234		3,234
Total liabilities		30,375		30,375
Total purchase price		91,752		91,752
Cash paid at closing				86,837
Fair value of contingent earnout		6,000		6,000
Net working capital and debt-like items adjustment				(1,085)
City Gear [Member] | Trade Names [Member]
Acquisition [Abstract]
Indefinite-lived intangible asset fair value	$ 32,400
City Gear [Member] | As Reported [Member]
Current assets:
Receivables						3,168
Inventories						44,807
Prepaid expense, other current and intangible assets						2,716
Total current assets						50,691
Goodwill						23,133
Property and equipment						16,530
Long-term intangible assets						33,601
Deposits and other assets						567
Deferred tax asset						24
Total assets						124,546
Current liabilities:
Accounts payable						23,615
Other accrued expenses and intangible liabilities						3,366
Total current liabilities						26,981
Other long-term liabilities and intangible liabilities						2,613
Total liabilities						29,594
Total purchase price						94,952
Cash paid at closing						86,837
Fair value of contingent earnout						9,200
Net working capital and debt-like items adjustment						$ (1,085)
City Gear [Member] | Adjustments [Member]
Current assets:
Receivables		564		564
Inventories		0		0
Prepaid expense, other current and intangible assets		(27)		(27)
Total current assets		537		537
Goodwill		(3,472)		(3,472)
Property and equipment		0		0
Long-term intangible assets		(98)		(98)
Deposits and other assets		0		0
Deferred tax asset		614		614
Total assets		(2,419)		(2,419)
Current liabilities:
Accounts payable		0		0
Other accrued expenses and intangible liabilities		160		160
Total current liabilities		160		160
Other long-term liabilities and intangible liabilities		621		621
Total liabilities		781		781
Total purchase price		(3,200)		(3,200)
Cash paid at closing				0
Fair value of contingent earnout		$ (3,200)		(3,200)
Net working capital and debt-like items adjustment				$ 0