Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock Outstanding [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Treasury Stock, At Cost [Member]
Beginning Balance at Dec. 30, 2018	$ 174,861			$ 250	$ 118,351	$ 98,787		$ (42,527)
Beginning Balance, Shares at Dec. 30, 2018			21,424,094
Net income (loss)	1,692					1,692
Dividends, Common Stock, Cash	(2,144)					(2,144)
Issuance of nonvested share awards				4	(4)
Issuance of nonvested share awards, Shares			338,256
Share-based compensation	1,018				1,018
Forfeiture of nonvested share awards, Shares			(18,655)
Retirement of common stock for payment of withholding tax	(221)			(1)	(220)
Retirement of common stock for payment of withholding tax, Shares			(59,094)
Ending Balance at Jun. 30, 2019	174,867	$ (339)		253	119,145	97,996	$ (339)	(42,527)
Ending Balance, shares at Jun. 30, 2019			21,684,601
Beginning Balance at Mar. 31, 2019	175,435			252	118,666	99,044		(42,527)
Beginning Balance, Shares at Mar. 31, 2019			21,624,472
Net income (loss)	28					28
Dividends, Common Stock, Cash	(1,076)					(1,076)
Issuance of nonvested share awards				1	(1)
Issuance of nonvested share awards, Shares			72,464
Share-based compensation	480				480
Forfeiture of nonvested share awards, Shares			(12,335)
Ending Balance at Jun. 30, 2019	174,867	$ (339)		253	119,145	97,996	$ (339)	(42,527)
Ending Balance, shares at Jun. 30, 2019			21,684,601
Beginning Balance at Dec. 29, 2019	180,372			252	120,054	102,593		(42,527)
Beginning Balance, Shares at Dec. 29, 2019			21,664,076
Net income (loss)	6,525					6,525
Dividends, Common Stock, Cash	(1,077)					(1,077)
Issuance of nonvested share awards				3	(3)
Issuance of nonvested share awards, Shares			321,600
Share-based compensation	881				881
Forfeiture of nonvested share awards, Shares			(19,895)
Retirement of common stock for payment of withholding tax	$ (97)				(97)
Retirement of common stock for payment of withholding tax, Shares	(64,573)		(64,573)
Ending Balance at Jun. 28, 2020	$ 186,604			255	120,835	108,041		(42,527)
Ending Balance, shares at Jun. 28, 2020			21,901,208
Beginning Balance at Mar. 29, 2020	175,058			254	120,430	96,901		(42,527)
Beginning Balance, Shares at Mar. 29, 2020			21,837,348
Net income (loss)	11,136					11,136
Forfeitures of dividends payable on common stock	4					4
Issuance of nonvested share awards				1	(1)
Issuance of nonvested share awards, Shares			80,000
Share-based compensation	406				406
Forfeiture of nonvested share awards, Shares			(16,140)
Ending Balance at Jun. 28, 2020	$ 186,604			$ 255	$ 120,835	$ 108,041		$ (42,527)
Ending Balance, shares at Jun. 28, 2020			21,901,208