CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2017	$ 2,323	$ 53,818	$ (3,532)	$ (47,208)	$ (2,176)	$ 3,225
Shares, Outstanding, Beginning Balance at Dec. 31, 2017	11,617
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance, Previously Reported	$ 2,323	53,818	(3,532)	(47,208)	(2,176)	3,225
Shares, Outstanding, Beginning Balance, Previously Reported	11,617
Impact of change in accounting policy topic 606				683		683
Impact of change in accounting policy topic 842				808		808
Stockholders' Equity Adjusted balance	$ 2,323	53,818	(3,532)	(45,717)	(2,176)	4,716
Shares Outstanding, Adjusted balance	11,617
Net income (loss)				2,689		2,689
Stock-based compensation		112				112
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 28, 2018	$ 2,323	53,930	(3,532)	(43,028)	(2,176)	7,517
Shares, Outstanding, Ending Balance at Sep. 28, 2018	11,617
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2018	$ 2,323	53,967	(3,532)	(42,409)	(1,976)	8,373
Shares, Outstanding, Beginning Balance at Dec. 31, 2018	11,617
Net income (loss)				(1,242)		(1,242)
Exercise of stock options	$ 26	(5)				21
Exercise of stock options, shares	130
Stock-based compensation		72				72
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Sep. 27, 2019	$ 2,349	$ 54,034	$ (3,532)	$ (43,651)	$ (1,976)	$ 7,224
Shares, Outstanding, Ending Balance at Sep. 27, 2019	11,747