Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in Shares) at Jan. 01, 2017	6,958
Balance at Jan. 01, 2017	$ 66		$ 19,902	$ 19,968
Common stock issued (in shares)	418
Common stock issued	$ 4	$ 1,460		$ 1,464
Exercise of stock options (in shares)				3
Tax benefit for equity awards issued			(55)	$ (55)
Stock-based compensation			227	227
Net income (loss)			(8,123)	(8,123)
Balance (in Shares) at Dec. 31, 2017	7,376
Balance at Dec. 31, 2017	$ 70	1,460	11,951	13,481
Common stock issued (in shares)	1,582
Common stock issued	$ 18	5,119		$ 5,137
Exercise of stock options (in shares)	102			102
Exercise of stock options	$ 2	432		$ 434
Stock-based compensation	25
Stock-based compensation	$ 1	364		365
Net income (loss)			4,862	4,862
Balance (in Shares) at Dec. 30, 2018	9,085
Balance at Dec. 30, 2018	$ 91	$ 7,375	15,075	22,541
Cumulative effect of change in accounting principle			$ (1,738)	$ (1,738)