CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 32,264,000	$ 22,450,000
Short-term investments	29,059,000	19,258,000
Accounts receivable, net of allowance for doubtful accounts of $69 and $41 in 2021 and 2020, respectively	21,023,000	16,445,000
Inventories	50,778,000	50,298,000
Prepaid expenses and other current assets	3,447,000	3,868,000
Total Current Assets	136,571,000	112,319,000
Long-term investments	19,423,000	46,207,000
Property, Plant and Equipment	233,217,000	218,912,000
Less: accumulated depreciation	135,245,000	123,977,000
Total Eqiupment	97,972,000	94,935,000
Other Assets and Deferred Charges:
Patents and licenses, net of accumulated amortization of $12,538 and $12,419 in 2021 and 2020, respectively	1,302,000	1,421,000
Goodwill	9,730,000	9,730,000
Other	2,266,000	2,278,000
Total Non- Current Assets	13,298,000	13,429,000
Total Assets	267,264,000	266,890,000
Current Liabilities:
Accounts payable	7,146,000	6,635,000
Accrued liabilities	5,930,000	6,565,000
Accrued income and other taxes	270,000	436,000
Total Current Liabilities	13,346,000	13,636,000
Line of credit	0	0
Other Liabilities and Deferred Credits:
Deferred income taxes	7,082,000	10,768,000
Other	2,540,000	2,044,000
Other Liabilities	9,622,000	12,812,000
Total Liabilities	22,968,000	26,448,000
Stockholders' Equity:
Common stock, par value $0.10 per share, authorized 10,000 shares, issued 3,420 shares	342,000	342,000
Additional paid-in capital	61,174,000	53,527,000
Retained earnings	357,324,000	337,700,000
Treasury shares, 1,619 shares in 2021 and 1,594 shares in 2020, at cost	(174,544,000)	(151,127,000)
Total Stockholders' Equity	244,296,000	240,442,000
Total Liabilities and Stockholders' Equity	$ 267,264,000	$ 266,890,000