Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2018 - 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. 30, 2017	15,017,522				2,823,172
Balance at Dec. 30, 2017	$ 751	$ 104,540	$ (2,395)	$ (65,878)	$ (14,987)	$ 22,031
Issuance of stock under employee stock purchase plan (in shares)	45,408
Issuance of stock under employee stock purchase plan	$ 2	192				194
Translation adjustment			(70)			(70)
Share-based compensation expense		112				112
Net income				1,051		1,051
Balance (in shares) at Mar. 31, 2018	15,062,930				2,823,172
Balance at Mar. 31, 2018	$ 753	$ 104,844	$ (2,465)	$ (64,827)	$ (14,987)	$ 23,318