Operating Segment and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended						4 Months Ended		12 Months Ended
	Dec. 29, 2018	Oct. 06, 2018	Mar. 24, 2018	Dec. 30, 2017	Oct. 07, 2017	Mar. 25, 2017	Jul. 14, 2018	Jul. 15, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net revenue	$ 50,992	$ 43,955	$ 32,149	$ 48,685	$ 42,861	$ 31,866	$ 48,684	$ 53,921	$ 175,780	$ 177,333	$ 171,662
Operating income	5,017	5,134	1,715	5,144	4,128	1,996	1,951	3,332	13,817	14,600	14,583
Interest expense									427	804	834
Provision for taxes									6,000	1,456	4,049
Net income	3,580	$ 3,575	$ 1,216	7,459	$ 3,118	$ 1,388	$ 12,071	$ 2,096	20,442	14,061	11,493
Identifiable assets	149,527			156,105					149,527	156,105	150,761
Non-marketable equity investments (equity method)	0			20,278					0	20,278	19,030
Depreciation & amortization									3,857	3,910	5,244
Capital expenditures									2,818	2,745	2,653
Sporting Goods [Member]
Segment Reporting Information [Line Items]
Net revenue									175,780	177,333	171,662
Operating income									13,999	15,600	15,731
Interest expense									427	975	802
Provision for taxes									3,739	6,134	6,173
Net income									9,869	8,626	8,774
Identifiable assets	142,490			130,388					142,490	130,388	125,780
Depreciation & amortization									3,857	3,910	5,244
Capital expenditures									2,818	2,745	2,653
All Other [Member]
Segment Reporting Information [Line Items]
Net revenue									0	0	0
Operating income									(182)	(1,000)	(1,148)
Interest expense (income)									0	(171)	32
Provision for taxes									2,261	(4,678)	(2,124)
Net income									10,573	5,435	2,719
Identifiable assets	7,037			25,717					7,037	25,717	24,981
Non-marketable equity investments (equity method)	$ 0			$ 20,278					0	20,278	19,030
Depreciation & amortization									0	0	0
Capital expenditures									$ 0	$ 0	$ 0