CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 28,346	$ 20,775
Short-term investments	44	3,084
Accounts receivable, net of allowance for doubtful accounts of $50 and $22 in 2015 and 2014, respectively	16,620	16,962
Inventories	29,771	28,022
Prepaid expenses and other current assets	2,934	4,720
Deferred income taxes	580	573
Total Current Assets	78,295	74,136
Long-term investments	9,866	21,760
Property, Plant and Equipment	150,807	142,171
Less accumulated depreciation and amortization	87,493	79,655
Property plant and equipment net	63,314	62,516
Other Assets and Deferred Charges:
Patents and licenses, net of accumulated amortization of $11,647 and $11,302 in 2015 and 2014, respectively	2,193	2,538
Goodwill	9,730	9,730
Other	938	834
Prepaid Expense and Other Assets, Noncurrent, Total	12,861	13,102
Total Assets	164,336	171,514
Current Liabilities:
Accounts payable	3,926	4,529
Accrued liabilities	5,061	4,950
Accrued income and other taxes	329	457
Total Current Liabilities	9,316	9,936
Line of credit	0	0
Other Liabilities and Deferred Credits:
Deferred income taxes	9,989	11,129
Other	933	879
Liabilities Noncurrent	10,922	12,008
Total Liabilities	20,238	$ 21,944
Commitments and Contingencies
Stockholders' Equity:
Common stock, par value $.10 per share, authorized 10,000 shares, issued 3,420 shares	342	$ 342
Additional paid-in capital	35,945	33,940
Accumulated other comprehensive income (loss)	283	(245)
Retained earnings	219,516	196,706
Treasury shares, 1,596 shares in 2015 and 1,507 shares in 2014, at cost	(111,988)	(81,173)
Total Stockholders' Equity	144,098	149,570
Total Liabilities and Stockholders' Equity	$ 164,336	$ 171,514