Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 23,405	$ 20,775
Short-term investments	114	3,084
Accounts receivable	19,604	16,962
Inventories	29,202	28,022
Prepaid expenses and other current assets	2,788	4,720
Deferred income taxes	573	573
Total Current Assets	75,686	74,136
Long-term investments	12,145	21,760
Property, plant and equipment	147,728	142,171
Less accumulated depreciation and amortization	85,486	79,655
Property plant and equipment net	62,242	62,516
Other assets and deferred charges:
Patents	2,256	2,538
Goodwill	9,730	9,730
Other	877	834
Prepaid Expense and Other Assets, Noncurrent, Total	12,863	13,102
Total assets	162,936	171,514
Current liabilities:
Accounts payable and accrued liabilities	9,374	9,479
Accrued income and other taxes	1,294	457
Total Current Liabilities	10,668	9,936
Line of credit	0	0
Other non-current liabilities	13,057	12,008
Stockholders' equity:
Common stock, par value $0.10 per share; authorized 10,000 shares, issued 3,420 shares	342	342
Paid-in capital	35,542	33,940
Accumulated other comprehensive income/(loss)	197	(245)
Retained earnings	215,118	196,706
Treasury shares,1,595 at September 30, 2015 and 1,507 at December 31, 2014, at cost	(111,988)	(81,173)
Total stockholders' equity	139,211	149,570
Total liabilities and stockholders' equity	$ 162,936	$ 171,514