BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents (Note 7)	$ 1,704,300	$ 967,943
Short-term investments	1,464,878	1,442,939
Trade receivables, less allowance of $62,000 in 2013 and $43,000 in 2012 (Notes 5, 7, and 8)	2,050,853	2,060,312
Inventories (Note 8)	2,554,942	2,678,864
Prepaid expenses and other assets	103,687	124,983
Income tax receivable	16,400
Deferred income taxes (Note 2)	150,000	142,000
Total current assets	8,045,060	7,417,041
PROPERTY, PLANT, AND EQUIPMENT, at cost:
Land and buildings	6,123,890	6,063,965
Machinery and equipment	3,781,282	3,219,598
Office equipment	722,567	700,062
Vehicles	237,194	237,488
Gross property, plant, and equipment, at cost	10,864,933	10,221,113
Less accumulated depreciation	5,230,837	4,759,235
Net property, plant, and equipment, at cost	5,634,096	5,461,878
INTANGIBLE ASSETS, less accumulated amortization of $535,421 in 2013 and $482,107 in 2012 (Note 3)	322,647	305,357
Total assets	14,001,803	13,184,276
CURRENT LIABILITIES:
Accounts payable	532,294	593,922
Accrued compensation	274,936	265,822
Other accrued liabilities	67,755	81,635
Income taxes payable		82,152
Total current liabilities	874,985	1,023,531
DEFERRED INCOME TAXES (Note 2)	527,000	366,000
Total liabilities	1,401,985	1,389,531
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 2,012,170 shares in 2013 and 1,998,475 shares in 2012 (Note 6)	201,217	199,848
Additional paid-in capital	2,592,038	2,470,507
Retained earnings	9,806,563	9,124,390
Total stockholders' equity	12,599,818	11,794,745
Total liabilities and stockholders' equity	$ 14,001,803	$ 13,184,276