CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and cash equivalents	$ 28,328	$ 29,674
Marketable securities	12,658	10,949
Trade accounts receivable, less allowance of $2,667 in 2011 and $2,413 in 2010	10,806	9,567
Inventories	14,539	13,116
Deferred income tax asset	1,892	1,843
Prepaid expenses and other current assets	970	917
TOTAL CURRENT ASSETS	69,193	66,066
Property and equipment, net	35,975	36,722
Intangible assets, net	10,889	12,319
Other assets	84	80
TOTAL ASSETS	116,141	115,187
CURRENT LIABILITIES
Trade accounts payable	1,959	1,887
Accrued salaries, wages and payroll taxes	2,681	2,340
Short-term borrowings	3,333	3,333
Income taxes payable	470	8
Other current liabilities	1,249	1,400
TOTAL CURRENT LIABILITIES	9,692	8,968
Long-term borrowings	22,000	23,667
Deferred income taxes	1,157	1,213
Decommissioning retirement liability	778	749
Other long-term liabilities	199	311
TOTAL LIABILITIES	33,826	34,908
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock, authorized 100,000 shares of $0.01 par value, issued and outstanding, 33,964 in 2011 and 33,651 in 2010	339	336
Additional paid-in capital	74,273	73,902
Retained earnings	7,672	6,029
Accumulated other comprehensive gain	31	12
TOTAL SHAREHOLDERS' EQUITY	82,315	80,279
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 116,141	$ 115,187