Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Operating activities
Net income	$ 3,686	$ 1,413
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	2,436	2,421
Write-off of prepaid royalties associated with the Pueblo aggregates deposit	632
Deferred income tax provision	1,533	771
Compensation of Board of Directors paid by issuance of treasury shares	152	197
Provision for doubtful accounts	280	63
Gain on disposition of property and equipment	(287)	(225)
Changes in working capital items:
Receivables	44	(2,767)
Inventories	(999)	(2,170)
Prepaid expenses	331	(499)
Accounts payable and accrued expenses	2,666	1,960
Income taxes payable and refundable	(669)	394
Other	(1,706)
Net cash provided by operating activities	8,099	1,558
Investing activities:
Capital expenditures	(4,405)	(2,303)
Cash proceeds from sale of property and equipment	310	233
Net cash used in investing activities	(4,095)	(2,070)
Financing activities:
Borrowings on the revolving bank loan	27,250	34,350
Repayments on the revolving bank loan	(31,450)	(33,950)
Payments to acquire treasury stock	(50)	(16)
Net cash (used in) provided by financing activities	(4,250)	384
Net decrease in cash and cash equivalents	(246)	(128)
Cash and cash equivalents:
Beginning of period	547	675
End of period	301	547
Cash paid (received) during the year for:
Interest, net	365	412
Income taxes, net	$ 1,285	$ (388)