Consolidated Statement of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Balance at Jan. 30, 2021	$ 246,498,000	$ 762,000	$ 115,278,000	$ 129,303,000	$ 1,155,000
Net income (loss)	20,713,000	0	0	20,713,000	0
Unrealized gain on available-for-sale securities, net of deferred income tax benefit	(134,000)	0	0	0	(134,000)
Dividends paid	0	0	0	0	0
Class A common stock sold through employee stock purchase plan	151,000	1,000	150,000	0	0
Share-based compensation issuances and exercises	1,000	13,000	(12,000)	0	0
Share-based compensation expense	283,000	0	283,000	0	0
Repurchase and retirement of treasury shares	(5,629,000)	(14,000)	0	(5,615,000)	0
Balance at May. 01, 2021	261,883,000	762,000	115,699,000	144,401,000	1,021,000
Balance at Jan. 30, 2021	246,498,000	762,000	115,278,000	129,303,000	1,155,000
Net income (loss)	34,705,000
Unrealized gain on available-for-sale securities, net of deferred income tax benefit	(279,000)
Balance at Jul. 31, 2021	273,812,000	760,000	117,312,000	154,864,000	876,000
Balance at May. 01, 2021	261,883,000	762,000	115,699,000	144,401,000	1,021,000
Net income (loss)	13,992,000	0	0	13,992,000	0
Unrealized gain on available-for-sale securities, net of deferred income tax benefit	(145,000)	0	0	0	(145,000)
Dividends paid	(2,488,000)	0	0	(2,488,000)	0
Class A common stock sold through employee stock purchase plan	23,000	0	23,000	0	0
Share-based compensation issuances and exercises	514,000	0	509,000	5,000	0
Share-based compensation expense	1,081,000	0	1,081,000	0	0
Repurchase and retirement of treasury shares	(1,048,000)	(2,000)	0	(1,046,000)	0
Balance at Jul. 31, 2021	273,812,000	760,000	117,312,000	154,864,000	876,000
Balance at Jan. 29, 2022	254,196,000	728,000	119,540,000	134,208,000	(280,000)
Net income (loss)	9,748,000	0	0	9,748,000	0
Unrealized gain on available-for-sale securities, net of deferred income tax benefit	(1,206,000)	0	0	0	(1,206,000)
Dividends paid	(3,638,000)	0	0	(3,638,000)	0
Class A common stock sold through employee stock purchase plan	111,000	0	111,000	0	0
Share-based compensation issuances and exercises	5,000	0	0	5,000	0
Share-based compensation expense	598,000	0	598,000	0	0
Repurchase and retirement of treasury shares	(9,162,000)	(20,000)	0	(9,142,000)	0
Balance at Apr. 30, 2022	250,652,000	708,000	120,249,000	131,181,000	(1,486,000)
Balance at Jan. 29, 2022	254,196,000	728,000	119,540,000	134,208,000	(280,000)
Net income (loss)	7,474,000
Unrealized gain on available-for-sale securities, net of deferred income tax benefit	(1,145,000)
Balance at Jul. 30, 2022	245,833,000	714,000	121,696,000	124,848,000	(1,425,000)
Balance at Apr. 30, 2022	250,652,000	708,000	120,249,000	131,181,000	(1,486,000)
Net income (loss)	(2,274,000)	0	0	(2,274,000)	0
Unrealized gain on available-for-sale securities, net of deferred income tax benefit	61,000	0	0	0	61,000
Dividends paid	(3,632,000)	0	0	(3,632,000)	0
Class A common stock sold through employee stock purchase plan	62,000	0	62,000	0	0
Share-based compensation issuances and exercises	321,000	7,000	308,000	6,000	0
Share-based compensation expense	1,077,000	0	1,077,000	0	0
Repurchase and retirement of treasury shares	(434,000)	(1,000)	0	(433,000)	0
Balance at Jul. 30, 2022	$ 245,833,000	$ 714,000	$ 121,696,000	$ 124,848,000	$ (1,425,000)