Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)	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 Jan. 02, 2021	16,224,191					4,681,311
Balance at Jan. 02, 2021	$ 811,000	$ (420,000)	$ 109,588,000	$ (2,550,000)	$ (67,974,000)	$ (17,217,000)	$ 22,238,000
Issuance of stock under employee stock purchase plan (in shares)	53,906					0
Issuance of stock under employee stock purchase plan	$ 3,000	0	58,000	0	0	$ 0	61,000
Equity compensation expense from awards issued	$ 0	0	545,000	0		$ 0	545,000
Issuance of stock upon vesting of restricted share awards (in shares)	175,000					0
Issuance of stock upon vesting of restricted share awards	$ 9,000	0	(9,000)	0	0	$ 0	0
Purchase of treasury stock (in shares)	0					344,172
Purchase of treasury stock	$ 0	0	0	0	0	$ (911,000)	(911,000)
Foreign currency translation adjustment	0	0	0	(111,000)		0	(111,000)
Net income	0	0	0	0	1,007,000	0	1,007,000
Equity compensation expense from awards issued	0	0	545,000	0		0	545,000
Net income	$ 0	0	0	0	1,007,000	$ 0	1,007,000
Stock subscription receivable (in shares)	57,696					0
Stock subscription receivable	$ 3,000	97,000	(3,000)	0	0	$ 0	97,000
Balance (in shares) at Apr. 03, 2021	16,510,793					5,025,483
Balance at Apr. 03, 2021	$ 826,000	(323,000)	110,179,000	(2,661,000)	(66,967,000)	$ (18,128,000)	22,926,000
Balance (in shares) at Jan. 02, 2021	16,224,191					4,681,311
Balance at Jan. 02, 2021	$ 811,000	(420,000)	109,588,000	(2,550,000)	(67,974,000)	$ (17,217,000)	$ 22,238,000
Purchase of treasury stock (in shares)							1,157,719
Net income							$ 5,015,000
Net income							5,015,000
Balance (in shares) at Oct. 02, 2021	16,695,480					5,839,030
Balance at Oct. 02, 2021	$ 834,000	(113,000)	110,781,000	(2,627,000)	(62,959,000)	$ (21,364,000)	24,552,000
Balance (in shares) at Apr. 03, 2021	16,510,793					5,025,483
Balance at Apr. 03, 2021	$ 826,000	(323,000)	110,179,000	(2,661,000)	(66,967,000)	$ (18,128,000)	22,926,000
Equity compensation expense from awards issued	$ 0	0	235,000	0	0	$ 0	235,000
Issuance of stock upon vesting of restricted share awards (in shares)	7,500					0
Issuance of stock upon vesting of restricted share awards	$ 0	0	0	0	0	$ 0	0
Purchase of treasury stock (in shares)	0					497,883
Purchase of treasury stock	$ 0	0	0	0	0	$ (1,733,000)	(1,733,000)
Foreign currency translation adjustment	0	0	0	68,000		0	68,000
Net income	0	0	0	0	1,256,000	0	1,256,000
Equity compensation expense from awards issued	0	0	235,000	0	0	0	235,000
Net income	$ 0	0	0	0	1,256,000	$ 0	1,256,000
Stock subscription receivable (in shares)	67,312					0
Stock subscription receivable	$ 3,000	113,000	(3,000)	0	0	$ 0	113,000
Balance (in shares) at Jul. 03, 2021	16,585,605					5,523,366
Balance at Jul. 03, 2021	$ 829,000	(210,000)	110,411,000	(2,593,000)	(65,711,000)	$ (19,861,000)	22,865,000
Issuance of stock under employee stock purchase plan (in shares)	47,878					0
Issuance of stock under employee stock purchase plan	$ 2,000	0	73,000	0	0	$ 0	75,000
Equity compensation expense from awards issued	$ 0	0	300,000	0	0	$ 0	300,000
Issuance of stock upon vesting of restricted share awards (in shares)	4,301					0
Issuance of stock upon vesting of restricted share awards	$ 0	0	0	0	0	$ 0	0
Purchase of treasury stock (in shares)	0					315,664
Purchase of treasury stock	$ 0	0	0	0	0	$ (1,503,000)	(1,503,000)
Foreign currency translation adjustment	0	0	0	(34,000)	0	0	(34,000)
Net income	0	0	0	0	2,752,000	0	2,752,000
Equity compensation expense from awards issued	0	0	300,000	0	0	0	300,000
Net income	$ 0	0	0	0	2,752,000	$ 0	2,752,000
Stock subscription receivable (in shares)	57,696					0
Stock subscription receivable	$ 3,000	97,000	(3,000)	0	0	$ 0	97,000
Balance (in shares) at Oct. 02, 2021	16,695,480					5,839,030
Balance at Oct. 02, 2021	$ 834,000	$ (113,000)	110,781,000	(2,627,000)	(62,959,000)	$ (21,364,000)	24,552,000
Balance (in shares) at Jan. 01, 2022	16,903,157					6,612,222
Balance at Jan. 01, 2022	$ 845,000		111,068,000	(2,699,000)	(56,985,000)	$ (26,260,000)	25,969,000
Issuance of stock under employee stock purchase plan (in shares)	37,133					0
Issuance of stock under employee stock purchase plan	$ 2,000		124,000	0	0	$ 0	126,000
Equity compensation expense from awards issued	$ 0		403,000	0	0	$ 0	403,000
Issuance of stock upon vesting of restricted share awards (in shares)	175,000					0
Issuance of stock upon vesting of restricted share awards	$ 9,000		(9,000)	0	0	$ 0	0
Purchase of treasury stock (in shares)	0					406,480
Purchase of treasury stock	$ 0		0	0	0	$ (2,781,000)	(2,781,000)
Foreign currency translation adjustment	0		0	(35,000)	0	0	(35,000)
Net income	0		0	0	6,520,000	0	6,520,000
Equity compensation expense from awards issued	0		403,000	0	0	0	403,000
Net income	$ 0		0	0	6,520,000	$ 0	6,520,000
Balance (in shares) at Apr. 02, 2022	17,115,290					7,018,702
Balance at Apr. 02, 2022	$ 856,000		111,586,000	(2,734,000)	(50,465,000)	$ (29,041,000)	30,202,000
Balance (in shares) at Jan. 01, 2022	16,903,157					6,612,222
Balance at Jan. 01, 2022	$ 845,000		111,068,000	(2,699,000)	(56,985,000)	$ (26,260,000)	$ 25,969,000
Purchase of treasury stock (in shares)							637,372
Net income							$ 16,052,000
Net income							16,052,000
Balance (in shares) at Oct. 01, 2022	17,221,211					7,249,594
Balance at Oct. 01, 2022	$ 861,000		112,590,000	(3,141,000)	(40,933,000)	$ (32,654,000)	36,723,000
Balance (in shares) at Apr. 02, 2022	17,115,290					7,018,702
Balance at Apr. 02, 2022	$ 856,000		111,586,000	(2,734,000)	(50,465,000)	$ (29,041,000)	30,202,000
Equity compensation expense from awards issued	$ 0		302,000	0	0	$ 0	302,000
Issuance of stock upon vesting of restricted share awards (in shares)	38,175					0
Issuance of stock upon vesting of restricted share awards	$ 1,000		(1,000)	0	0	$ 0	0
Foreign currency translation adjustment	0		0	(226,000)	0	0	(226,000)
Net income	0		0	0	6,014,000	0	6,014,000
Equity compensation expense from awards issued	0		302,000	0	0	0	302,000
Net income	$ 0		0	0	6,014,000	$ 0	6,014,000
Balance (in shares) at Jul. 02, 2022	17,153,465					7,018,702
Balance at Jul. 02, 2022	$ 857,000		111,887,000	(2,960,000)	(44,451,000)	$ (29,041,000)	36,292,000
Issuance of stock under employee stock purchase plan (in shares)	46,746					0
Issuance of stock under employee stock purchase plan	$ 2,000		280,000	0	0	$ 0	282,000
Equity compensation expense from awards issued	$ 0		425,000	0	0	$ 0	425,000
Issuance of stock upon vesting of restricted share awards (in shares)	21,000					0
Issuance of stock upon vesting of restricted share awards	$ 2,000		(2,000)	0	0	$ 0	0
Purchase of treasury stock (in shares)	0					230,892
Purchase of treasury stock	$ 0		0	0	0	$ (3,613,000)	(3,613,000)
Foreign currency translation adjustment	0		0	(181,000)	0	0	(181,000)
Net income	0		0	0	3,518,000	0	3,518,000
Equity compensation expense from awards issued	0		425,000	0	0	0	425,000
Net income	$ 0		0	0	3,518,000	$ 0	3,518,000
Balance (in shares) at Oct. 01, 2022	17,221,211					7,249,594
Balance at Oct. 01, 2022	$ 861,000		$ 112,590,000	$ (3,141,000)	$ (40,933,000)	$ (32,654,000)	$ 36,723,000