Consolidated Statements of Shareholders' Equity - 3 months ended Mar. 31, 2019 - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in Shares) at Dec. 30, 2018	9,085
Balance at Dec. 30, 2018	$ 91	$ 7,375	$ 15,075	$ 22,541
Stock-based compensation (in Shares)	189
Stock-based compensation	$ 2	81		83
Net income			82	82
Balance (in Shares) at Mar. 31, 2019	9,274
Balance at Mar. 31, 2019	$ 93	$ 7,456	15,133	22,682
Cumulative effect of change in accounting principle			$ (24)	$ (24)