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 (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
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)
Dividends to stockholders		(12,194)				(12,194)
Dividends accrued		(87)				(87)
Net income				2,010		2,010
Accrued dividends forfeited
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)	90,877
Issuance of stock under employee stock purchase plan	$ 4	381				385
Translation adjustment			(360)			(360)
Issuance of stock upon vesting of restricted share units (in shares)	29,195
Issuance of stock upon vesting of restricted share units	$ 1	(1)
Share based compensation expense		544				544
Net income				2,715		2,715
Accrued dividends forfeited		6				6
Common stock issued for acquisition (in shares)	440,751
Common stock issued for acquisition	$ 22	1,856				1,878
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