CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 20,022	$ 28,346
Short-term investments	24,080	44
Accounts receivable, net of allowance for doubtful accounts of $71 and $50 in 2016 and 2015, respectively	17,166	16,620
Inventories	29,015	29,771
Prepaid expenses and other current assets	3,181	2,934
Deferred income taxes	651	580
Total Current Assets	94,115	78,295
Long-term investments	9,945	9,866
Property, Plant and Equipment	160,413	150,807
Less accumulated depreciation and amortization	95,148	87,493
Property plant and equipment net	65,265	63,314
Other Assets and Deferred Charges:
Patents and licenses, net of accumulated amortization of $11,911 and $11,647 in 2016 and 2015, respectively	1,929	2,193
Goodwill	9,730	9,730
Other	1,609	938
Prepaid Expense and Other Assets, Noncurrent, Total	13,268	12,861
Total Assets	182,593	164,336
Current Liabilities:
Accounts payable	4,028	3,926
Accrued liabilities	4,635	5,061
Accrued income and other taxes	410	329
Total Current Liabilities	9,073	9,316
Line of credit	0	0
Other Liabilities and Deferred Credits:
Deferred income taxes	9,404	9,989
Other	1,128	933
Liabilities Noncurrent	10,532	10,922
Total Liabilities	19,605	20,238
Stockholders' Equity:
Common stock, par value $.10 per share, authorized 10,000 shares, issued 3,420 shares	342	342
Additional paid-in capital	37,448	35,945
Accumulated other comprehensive income (loss)	(474)	283
Retained earnings	239,946	219,516
Treasury shares, 1,596 shares in both 2016 and 2015, at cost	(114,274)	(111,988)
Total Stockholders' Equity	162,988	144,098
Total Liabilities and Stockholders' Equity	$ 182,593	$ 164,336