Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Stock Subscriptions Receivable [Member]	Total
Balance (in shares) at Dec. 28, 2019	15,826,891				2,823,172
Balance at Dec. 28, 2019	$ 791	$ 108,452	$ (2,748)	$ (59,105)	$ (14,987)		$ 32,403
Issuance of stock under employee stock purchase plan (in shares)	57,251
Issuance of stock under employee stock purchase plan	$ 3	137					140
Equity compensation expense from awards issued		69					69
Issuance of stock upon vesting of restricted share awards (in shares)	60,000
Issuance of stock upon vesting of restricted share awards	$ 3	(3)
Purchase of treasury stock (in shares)							0
Foreign currency translation adjustment			(131)				$ (131)
Net income (loss)				(5,945)			(5,945)
Issuance of equity awards (in shares)	60,000
Balance (in shares) at Mar. 28, 2020	15,944,142				2,823,172
Balance at Mar. 28, 2020	$ 797	108,655	(2,879)	(65,050)	$ (14,987)		26,536
Balance (in shares) at Jan. 02, 2021	16,224,191				4,681,311
Balance at Jan. 02, 2021	$ 811	109,588	(2,550)	(67,974)	$ (17,217)	$ (420)	22,238
Issuance of stock under employee stock purchase plan (in shares)	53,906
Issuance of stock under employee stock purchase plan	$ 3	58					61
Stock subscription receivable (in shares)	57,696
Stock subscription receivable	$ 3	(3)				97	97
Equity compensation expense from awards issued		545					545
Issuance of stock upon vesting of restricted share awards (in shares)	175,000
Issuance of stock upon vesting of restricted share awards	$ 9	(9)
Purchase of treasury stock (in shares)					344,172		344,172
Purchase of treasury stock					$ (911)		$ (911)
Foreign currency translation adjustment			(111)				(111)
Net income (loss)				1,007			1,007
Issuance of equity awards (in shares)	175,000
Balance (in shares) at Apr. 03, 2021	16,510,793				5,025,483
Balance at Apr. 03, 2021	$ 826	$ 110,179	$ (2,661)	$ (66,967)	$ (18,128)	$ (323)	$ 22,926