Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Cash flows from Operating Activities:
Net income	$ 8,749	$ 15,038	$ 28,410
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	18,249	16,157	17,967
Net (gain) on disposition of assets	0	0	(2,680)
Provision for class action settlement	11,000	0	0
Bad debt provision	1,486	628	402
Share-based compensation	3,976	4,381	3,036
Deferred taxes	2,641	4,960	5,251
Other, net	678	321	624
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable	(5,118)	(5,923)	1,627
Decrease (increase) in inventory	4,025	(11,158)	(3,081)
(Increase) decrease in prepaid and other current assets	(267)	(940)	198
Increase (decrease) in accounts payable	3,921	6,002	(4,912)
Increase (decrease) in accrued expenses	3,914	606	(1,511)
Cash provided by operating activities	53,254	30,072	45,331
Cash flows from Investing Activities:
Capital expenditures	(31,293)	(22,820)	(14,400)
Proceeds from the disposal of assets	0	89	4,392
Business acquisitions, net of cash acquired	(3,521)	(4,805)	0
Cash used in investing activities	(34,814)	(27,536)	(10,008)
Cash flows from Financing Activities:
Payments of Term Loan	0	0	(64,195)
Proceeds of Term Loan	0	0	30,000
Proceeds from the exercise of stock options	20	122	5,464
Proceeds under revolving credit facility	0	0	4,000
Payments of revolving credit facility	0	0	(4,000)
Payments of debt issuance costs	0	0	(1,051)
Proceeds from the issuance of common stock	483	422	402
Share repurchases to satisfy tax withholding obligations	(1,428)	(1,030)	(355)
Distributions to noncontrolling interest	(400)	(360)	(309)
Cash used in financing activities	(1,325)	(846)	(30,044)
Net increase in cash and cash equivalents	17,115	1,690	5,279
Cash and cash equivalents, beginning of period	43,579	41,889	36,610
Cash and cash equivalents, end of period	60,694	43,579	41,889
Supplemental disclosure of cash flow information:
Income taxes paid	1,207	933	485
Cash paid for interest	1,254	1,154	1,129
Supplemental disclosure of non-cash information:
Payables for construction in progress	2,575	1,413	386
Provision for class action settlement	$ 11,000	$ 0	$ 0