CONDENSED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 1,129,716	$ 1,704,300
Short-term investments	2,015,930	1,464,878
Trade receivables, less allowance of $49,000 in 2014 and $62,000 in 2013	2,244,039	2,050,853
Inventories	2,631,347	2,554,942
Prepaid expenses and other assets	135,400	103,687
Income taxes receivable	72,743	16,400
Deferred income taxes	150,000	150,000
Total current assets	8,379,175	8,045,060
PROPERTY, PLANT, AND EQUIPMENT, at cost:
Land and buildings	6,251,620	6,123,890
Machinery and equipment	3,972,896	3,781,282
Office equipment	740,811	722,567
Vehicles	247,356	237,194
Gross property, plant, and equipment, at cost	11,212,683	10,864,933
Less accumulated depreciation	5,507,780	5,230,837
Net property, plant, and equipment, at cost	5,704,903	5,634,096
INTANGIBLE ASSETS, less accumulated amortization of $186,030 in 2014 and $173,143 in 2013	348,350	322,647
Total assets	14,432,428	14,001,803
CURRENT LIABILITIES:
Accounts payable	511,723	532,294
Accrued compensation	244,889	274,936
Other accrued liabilities	66,383	67,755
Total current liabilities	822,995	874,985
DEFERRED INCOME TAXES	527,000	527,000
Total liabilities	1,349,995	1,401,985
STOCKHOLDERS' EQUITY:
Preferred stock, par value $.10 per share; authorized 250,000 shares: issued none
Common stock, par value $.10 per share; authorized 4,750,000 shares: issued and outstanding 2,018,086 shares in 2014 and 2,012,170 shares in 2013	201,809	201,217
Additional paid-in capital	2,670,714	2,592,038
Retained earnings	10,209,910	9,806,563
Total stockholders' equity	13,082,433	12,599,818
Total liabilities and stockholders' equity	$ 14,432,428	$ 14,001,803