CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 28,117	$ 29,553
Marketable securities	10,576	11,625
Trade accounts receivable, less allowance of $584 in 2012 and $2,757 in 2011	11,865	11,375
Inventories	16,477	15,771
Deferred income tax asset	1,199	2,028
Refundable income taxes		401
Prepaid expenses and other current assets	1,132	985
TOTAL CURRENT ASSETS	69,366	71,738
Property and equipment, net	33,751	34,519
Intangible assets, net	16,274	9,459
Deferred income tax asset - long term	500
Other assets	73	102
TOTAL ASSETS	119,964	115,818
CURRENT LIABILITIES
Accounts payable	2,011	1,816
Accrued salaries, wages and payroll taxes	2,410	2,861
Short-term borrowings	22,000	23,667
Earn-out payable - current	3,515
Income taxes payable	60
Other current liabilities	1,183	1,104
TOTAL CURRENT LIABILITIES	31,179	29,448
Earn-out payable - long term	817
Deferred income taxes		1,043
Asset retirement obligations	839	807
Other long-term liabilities	713	398
TOTAL LIABILITIES	33,548	31,696
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock, authorized 100,000 shares of $0.01 par value, issued and outstanding, 34,730 in 2012 and 33,991 in 2011	347	340
Additional paid-in capital	75,173	74,705
Retained earnings	10,865	9,093
Accumulated other comprehensive gain (loss)	31	(16)
TOTAL SHAREHOLDERS' EQUITY	86,416	84,122
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 119,964	$ 115,818