Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - 3 months ended Apr. 01, 2017 - 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)	43,748
Issuance of stock under employee stock purchase plan	$ 2	190				192
Translation adjustment			4			4
Share-based compensation expense		203				203
Common stock repurchase (in shares)					59,312
Common stock repurchase					$ (365)	(365)
Net income				550		550
Balance (in shares) at Apr. 01, 2017	14,760,668				2,823,172
Balance at Apr. 01, 2017	$ 738	$ 116,000	$ (2,574)	$ (67,338)	$ (14,987)	$ 31,839