Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Operating activities
Net loss	$ (13,899,000)	$ (5,856,000)
Discontinued operations, net of income tax	(3,479,000)	(846,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	1,962,000	1,472,000
Write-off of deferred development costs		5,409,000
Impairment of mining property assets	22,492,000
Write-off of overpayment of prepaid royalties		627,000
Deferred income tax provision	(4,253,000)	(1,798,000)
Stock based compensation	204,000
Compensation of Board of Directors paid by issuance of treasury shares	568,000	315,000
Provision for doubtful accounts	189,000	165,000
Gain on disposition of property and equipment	(1,237,000)
Changes in working capital items:
Receivables	(3,096,000)	(1,091,000)
Inventories	2,995,000	3,961,000
Prepaid expenses	(256,000)	116,000
Accounts payable and accrued expenses	5,251,000	(282,000)
Income taxes payable and refundable	(1,903,000)	(436,000)
Other	(2,965,000)	305,000
Net cash provided by continuing operations	2,573,000	2,061,000
Net cash (used) provided by discontinued operations	(2,138,000)	631,000
Net cash provided by operating activities	435,000	2,692,000
Investing activities:
Capital expenditures by continuing operations	(2,693,000)	(1,409,000)
Capital expenditures by discontinued operations	(172,000)	(1,291,000)
Payments for acquisitions	(22,521,000)
Cash proceeds from sale of discontinued operations	23,679,000
Cash proceeds from sale of continuing operations property and equipment	2,593,000
Cash proceeds from sale of discontinued operations property and equipment		1,430,000
Net cash provided (used) by investing activities	886,000	(1,270,000)
Financing activities:
Borrowings on the revolving bank loan	21,750,000	33,100,000
Repayments on the revolving bank loan	(23,150,000)	(34,400,000)
Repayments of finance lease obligations	(80,000)	(30,000)
Payments to acquire treasury stock	(257,000)	(5,000)
Net cash used by financing activities	(1,737,000)	(1,335,000)
Net (decrease) increase in cash and cash equivalents	(416,000)	87,000
Cash and cash equivalents:
Beginning of period	594,000	507,000
End of period	178,000	594,000
Cash paid during the year for:
Interest, net	333,000	468,000
Income taxes, net	1,840,000	50,000
Contingent consideration from acquisitions	1,540,000
ARO liabilities and assets recognized	22,492,000
Capital expenditures purchased through capital lease obligation		200,000
Assets reclassified as held for sale	896,000	24,036,000
Liabilities reclassified as held for sale		$ 4,092,000
Right of use assets obtained in exchange for operating lease liabilities	$ 587,000