Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance, January 2, 2016 (in shares) at Jan. 02, 2016	14,559,381				2,062,746
Balance, January 2, 2016 at Jan. 02, 2016	$ 728	$ 114,331	$ (2,845)	$ (69,646)	$ (10,365)	$ 32,203
Issuance of stock under employee stock purchase plan (in shares)	81,225
Issuance of stock under employee stock purchase plan	$ 4	364				368
Translation adjustment			267			$ 267
Issuance of stock upon exercise of stock options (in shares)	2,500					2,500
Issuance of stock upon exercise of stock options		15				$ 15
Issuance of stock upon vesting of restricted share units (in shares)	73,834
Issuance of stock upon vesting of restricted share units	$ 4	(4)
Share based compensation expense		901				901
Common stock repurchase (in shares)					701,114
Common stock repurchase					$ (4,257)	(4,257)
Net income				1,758		1,758
Balance (in shares) at Dec. 31, 2016	14,716,940				2,763,860
Balance at Dec. 31, 2016	$ 736	115,607	(2,578)	(67,888)	$ (14,622)	31,255
Issuance of stock under employee stock purchase plan (in shares)	90,931
Issuance of stock under employee stock purchase plan	$ 4	390				394
Translation adjustment			183			$ 183
Issuance of stock upon exercise of stock options (in shares)	11,917					11,917
Issuance of stock upon exercise of stock options	$ 1	64				$ 65
Issuance of stock upon vesting of restricted share units (in shares)	197,734
Issuance of stock upon vesting of restricted share units	$ 10	(10)
Share based compensation expense		770				770
Common stock repurchase (in shares)					59,312
Common stock repurchase					$ (365)	(365)
Net income				2,010		2,010
Dividends to stockholders		(12,194)				(12,194)
Dividends accrued		(87)				(87)
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