Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Consolidated Statements of Income
Net sales	$ 152,810	$ 151,592
Costs and expenses:
Cost of sales (exclusive of depreciation, depletion and amortization)	124,715	119,819
Depreciation, depletion and amortization	2,554	2,436
Selling and administrative	22,643	23,151
Charges related to cessation of mining an aggregates deposit		632
Gain on disposition of property and equipment	(118)	(287)
Operating income	3,016	5,841
Interest income	79	306
Interest expense	(366)	(367)
Other income, net	110	54
Income before income taxes	2,839	5,834
Provision for income taxes	(1,021)	(2,148)
Net income	$ 1,818	$ 3,686
Basic and diluted income per share	$ 1.08	$ 2.21
Average shares outstanding (in shares)	1,680	1,669