Note 1 - Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Dec. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jul. 01, 2018	Jul. 02, 2018
Contract with Customer, Liability, Current	$ 28,500		$ 28,500			$ 13,500
Contract with Customer, Liability, Revenue Recognized	2,800		12,300
Gift Card Liability, Current	1,800		1,800
Accrued Liabilities, Current, Total	140,065		140,065			$ 73,299
Selling and Marketing Expense, Total	119,664	$ 113,771	172,618	$ 163,493
Net Income (Loss) Attributable to Parent, Total	68,578	$ 70,699	51,312	$ 57,477
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						28.00%
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					21.00%
Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption							$ 300
Gift Card Liability, Current							(1,900)
Prepaid Expense, Catalog Costs							(800)
Accrued Liabilities, Current, Total							$ 800
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Selling and Marketing Expense, Total	400		1,200
Net Income (Loss) Attributable to Parent, Total	$ 300		$ 900