Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011
Current assets
Cash and cash equivalents	$ 840	$ 1,032
Receivables less allowance of $500 and $580	18,176	19,868
Current portion of long-term note receivable - related party	35
Receivable for insured losses	439	807
Inventories	17,397	16,623
Prepaid expenses	1,264	1,374
Cash deposit for self-insured claims	4,340
Deferred income taxes	1,624	1,584
Real estate held for resale - related party	723
Total current assets	44,838	41,288
Property, plant and equipment
Land and improvements	2,341	2,011
Buildings and improvements	20,453	18,578
Machinery and equipment	75,955	78,301
Mining properties	6,893	6,510
Less accumulated depreciation and depletion	(84,556)	(81,707)
Total property, plant and equipment	21,086	23,693
Other assets
Goodwill	7,229	7,229
Amortizable intangible assets, net	242	343
Prepaid royalties	1,646	1,415
Cash deposit for self-insured claims		4,840
Long-term note receivable - related party	317	240
Other	513	513
Total assets	75,871	79,561
Current liabilities
Current portion of long-term debt	500	1,125
Accounts payable	4,192	5,428
Income taxes	128	409
Accrued expenses
Compensation	1,752	1,620
Reserve for self-insured losses	2,676	2,498
Liability for unpaid claims covered by insurance	439	807
Profit sharing	589	341
Reclamation	195	115
Other	2,291	2,981
Total current liabilities	12,762	15,324
Revolving bank loan payable	8,150	5,750
Long-term debt	3,783	4,410
Deferred income taxes	179	1,324
Accrued reclamation	920	1,090
Other long-term liabilities	771	858
Commitments and contingencies (Note 6)
SHAREHOLDERS' EQUITY
Common shares, $.25 par value; authorized 3,000,000 shares; issued 2,574,264 shares	643	643
Capital in excess of par value	1,870	1,830
Retained earnings	62,999	64,947
Treasury shares, at cost	(16,206)	(16,615)
Total shareholders' equity	49,306	50,805
Total liabilities and shareholders' equity	$ 75,871	$ 79,561