Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings (Accumulated Deficit)
Adjustment for adoption of accounting standards, net of tax	$ (707)				$ (707)
Beginning Balance, Shares at Jan. 02, 2018		38,434,274
Beginning Balance at Jan. 02, 2018	416,249	$ 4	$ 349,334	$ 14	66,897
Net income (loss)	3,229				3,229
Other comprehensive income (loss), net of tax	180			180
Comprehensive income (loss)	3,409
Stock-based compensation	1,274		1,274
Issuance of vested restricted stock, net of shares withheld for tax withholding, shares		9,892
Issuance of vested restricted stock, net of shares withheld for tax withholding	(79)		(79)
Exercise of stock options, shares		4,750
Exercise of stock options	48		48
Repurchase of common stocks and warrants, shares		0
Repurchase of common stocks and warrants	(34)		(34)
Ending Balance, Shares at Mar. 27, 2018		38,448,916
Ending Balance at Mar. 27, 2018	420,239	$ 4	350,543	194	69,419
Adjustment for adoption of accounting standards, net of tax	1,912				1,912
Beginning Balance, Shares at Jan. 01, 2019		37,305,342
Beginning Balance at Jan. 01, 2019	422,274	$ 4	336,941	180	85,149
Net income (loss)	1,425				1,425
Other comprehensive income (loss), net of tax	(118)			(118)
Comprehensive income (loss)	1,307
Stock-based compensation	1,577		1,577
Issuance of vested restricted stock, net of shares withheld for tax withholding, shares		13,172
Issuance of vested restricted stock, net of shares withheld for tax withholding	(84)		(84)
Exercise of stock options, shares		1,500
Exercise of stock options	16		16
Repurchase of common stocks and warrants, shares		(270,874)
Repurchase of common stocks and warrants	(4,306)		(4,306)
Ending Balance, Shares at Mar. 26, 2019		37,049,140
Ending Balance at Mar. 26, 2019	$ 422,696	$ 4	$ 334,144	$ 62	$ 88,486