Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)
Stockholders' equity, beginning balance (in shares) at Dec. 30, 2018	9,779,147
Stockholders' equity, beginning balance at Dec. 30, 2018	$ 48,888	$ 10	$ 45,882	$ 2,997
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(189)			(189)
Stock option expense	33		33
Cash dividends paid	$ (489)			(489)
Stockholders' equity, ending balance (in shares) at Mar. 31, 2019	9,779,147
Stockholders' equity, ending balance at Mar. 31, 2019	$ 48,243	10	45,915	2,319
Stockholders' equity, beginning balance (in shares) at Dec. 30, 2018	9,779,147
Stockholders' equity, beginning balance at Dec. 30, 2018	$ 48,888	10	45,882	2,997
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (7,812)
Stockholders' equity, ending balance (in shares) at Jun. 30, 2019	9,779,147
Stockholders' equity, ending balance at Jun. 30, 2019	$ 40,684	10	45,980	(5,305)
Stockholders' equity, beginning balance (in shares) at Mar. 31, 2019	9,779,147
Stockholders' equity, beginning balance at Mar. 31, 2019	$ 48,243	10	45,915	2,319
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(7,624)			(7,624)
Stock option expense	$ 65		65
Stockholders' equity, ending balance (in shares) at Jun. 30, 2019	9,779,147
Stockholders' equity, ending balance at Jun. 30, 2019	$ 40,684	10	45,980	(5,305)
Stockholders' equity, beginning balance (in shares) at Dec. 29, 2019	9,779,147
Stockholders' equity, beginning balance at Dec. 29, 2019	$ 39,460	10	46,011	(6,561)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,137)			(1,137)
Stock option expense	$ 23		23
Stockholders' equity, ending balance (in shares) at Mar. 31, 2020	9,779,147
Stockholders' equity, ending balance at Mar. 31, 2020	$ 38,347	10	46,034	(7,697)
Stockholders' equity, beginning balance (in shares) at Dec. 29, 2019	9,779,147
Stockholders' equity, beginning balance at Dec. 29, 2019	$ 39,460	10	46,011	(6,561)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ (5,453)
Stockholders' equity, ending balance (in shares) at Jun. 30, 2020	9,779,147
Stockholders' equity, ending balance at Jun. 30, 2020	$ 34,062	10	46,066	(12,014)
Stockholders' equity, beginning balance (in shares) at Mar. 31, 2020	9,779,147
Stockholders' equity, beginning balance at Mar. 31, 2020	$ 38,347	10	46,034	(7,697)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(4,317)			(4,317)
Stock option expense	$ 32		32
Stockholders' equity, ending balance (in shares) at Jun. 30, 2020	9,779,147
Stockholders' equity, ending balance at Jun. 30, 2020	$ 34,062	$ 10	$ 46,066	$ (12,014)