CONDENSED BALANCE SHEETS - USD ($)	Jun. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 2,368,778	$ 1,936,214
Short-term investments	1,205,000	1,766,000
Trade receivables, less allowance of $56,000 in 2015 and $49,000 in 2014	2,154,908	2,096,328
Inventories	2,363,893	2,630,650
Prepaid expenses and other assets	145,920	86,400
Income taxes receivable	246,111	163,651
Deferred income taxes	178,000	178,000
Total current assets	8,662,610	8,857,243
PROPERTY, PLANT, AND EQUIPMENT, at cost:
Land and buildings	6,500,802	6,247,781
Machinery and equipment	4,208,267	3,956,561
Office equipment	817,072	754,220
Vehicles	247,356	247,356
Gross property, plant, and equipment, at cost	11,773,497	11,205,918
Less accumulated depreciation	6,116,830	5,789,070
Net property, plant, and equipment, at cost	5,656,667	5,416,848
INTANGIBLE ASSETS, less accumulated amortization of $212,079 in 2015 and $198,918 in 2014	325,113	353,871
Total assets	14,644,390	14,627,962
CURRENT LIABILITIES:
Accounts payable	596,217	371,181
Accrued compensation	248,483	294,706
Other accrued liabilities	107,015	78,610
Total current liabilities	951,715	744,497
DEFERRED INCOME TAXES	545,000	545,000
Total liabilities	$ 1,496,715	$ 1,289,497
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 2,018,253 shares in 2015 and 2014	$ 201,825	$ 201,825
Additional paid-in capital	2,691,740	2,681,307
Retained earnings	10,254,110	10,455,333
Total stockholders' equity	13,147,675	13,338,465
Total liabilities and stockholders' equity	$ 14,644,390	$ 14,627,962