CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 20,122	$ 29,553
Marketable securities	11,648	11,625
Trade accounts receivable, less allowance of $717 in 2012 and $2,757 in 2011	10,371	11,375
Inventories	16,299	15,771
Deferred income tax asset	1,118	2,028
Refundable income taxes	106	401
Prepaid expenses and other current assets	650	985
TOTAL CURRENT ASSETS	60,314	71,738
Property and equipment, net	32,921	34,519
Intangible assets, net	11,882	9,459
Deferred income tax asset	709
Other assets	72	102
TOTAL ASSETS	105,898	115,818
CURRENT LIABILITIES
Accounts payable	1,468	1,816
Accrued salaries, wages and payroll taxes	2,940	2,861
Short-term borrowings		23,667
Other current liabilities	1,285	1,104
TOTAL CURRENT LIABILITIES	5,693	29,448
Long-term borrowings	22,000
Deferred income taxes		1,043
Asset retirement obligations	854	807
Other long-term liabilities	342	398
TOTAL LIABILITIES	28,889	31,696
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock, authorized 100,000 shares of $0.01 par value, issued 34,741 in 2012 and 33,991 in 2011	347	340
Additional paid-in capital	75,436	74,705
Retained earnings	11,555	9,093
Accumulated other comprehensive gain (loss)	53	(16)
Common stock in treasury, at cost - 4,762 shares in 2012	(10,382)
TOTAL SHAREHOLDERS' EQUITY	77,009	84,122
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 105,898	$ 115,818