Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Stock Subscriptions Receivable [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 29, 2018	15,578,345					2,823,172
Balance at Dec. 29, 2018	$ 778		$ 107,326	$ (2,755)	$ (63,163)	$ (14,987)	$ 27,199
Issuance of stock under employee stock purchase plan (in shares)	118,526
Issuance of stock under employee stock purchase plan	$ 6		315				321
Translation adjustment				7			7
Issuance of stock upon vesting of restricted share awards (in shares)	130,020
Issuance of stock upon vesting of restricted share awards	$ 7		(7)
Equity compensation expense from awards issued			806				806
Accrued dividends forfeited			12				12
Net income (loss)					4,058		4,058
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)	117,983
Issuance of stock under employee stock purchase plan	$ 6		202				208
Translation adjustment				198			198
Issuance of stock upon vesting of restricted share awards (in shares)	279,317
Issuance of stock upon vesting of restricted share awards	$ 14		(14)
Equity compensation expense from awards issued			528				528
Net income (loss)					(8,869)		(8,869)
Stock subscription receivable (in shares)
Stock subscription receivable		(420)	420
Purchase of treasury stock (in shares)						1,858,139
Purchase of treasury stock						$ (2,230)	(2,230)
Balance (in shares) at Jan. 02, 2021	16,224,191					4,681,311
Balance at Jan. 02, 2021	$ 811	$ (420)	$ 109,588	$ (2,550)	$ (67,974)	$ (17,217)	$ 22,238