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]	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)	59,451
Issuance of stock under employee stock purchase plan	$ 3	162				165
Translation adjustment			11			11
Share-based compensation expense		241				241
Issuance of equity awards (in shares)	57,148
Issuance of equity awards	$ 3	(3)
Net (loss) income				1,463		1,463
Balance (in shares) at Mar. 30, 2019	15,694,944				2,823,172
Balance at Mar. 30, 2019	$ 784	107,726	(2,744)	(61,700)	$ (14,987)	29,079
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
Translation adjustment						23
Net (loss) income						2,714
Balance (in shares) at Jun. 29, 2019	15,719,944				2,823,172
Balance at Jun. 29, 2019	$ 785	107,932	(2,732)	(60,449)	$ (14,987)	30,549
Balance (in shares) at Mar. 30, 2019	15,694,944				2,823,172
Balance at Mar. 30, 2019	$ 784	107,726	(2,744)	(61,700)	$ (14,987)	29,079
Translation adjustment			12			12
Share-based compensation expense		207				207
Issuance of equity awards (in shares)	25,000
Issuance of equity awards	$ 1	(1)
Net (loss) income				1,251		1,251
Balance (in shares) at Jun. 29, 2019	15,719,944				2,823,172
Balance at Jun. 29, 2019	$ 785	107,932	(2,732)	(60,449)	$ (14,987)	30,549
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
Translation adjustment			(131)			(131)
Share-based compensation expense		69				69
Issuance of equity awards (in shares)	60,000
Issuance of equity awards	$ 3	(3)
Net (loss) income				(5,945)		(5,945)
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 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
Translation adjustment						(74)
Net (loss) income						(6,937)
Balance (in shares) at Jun. 27, 2020	16,010,694				4,681,311
Balance at Jun. 27, 2020	$ 800	108,819	(2,822)	(66,042)	$ (17,217)	23,538
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
Translation adjustment			57			57
Share-based compensation expense		167				167
Issuance of equity awards (in shares)	66,552
Issuance of equity awards	$ 3	(3)
Net (loss) income				(992)		(992)
Common stock repurchase (in shares)					1,858,139
Common stock repurchase					$ (2,230)	(2,230)
Balance (in shares) at Jun. 27, 2020	16,010,694				4,681,311
Balance at Jun. 27, 2020	$ 800	$ 108,819	$ (2,822)	$ (66,042)	$ (17,217)	$ 23,538