CONDENSED BALANCE SHEETS - USD ($)	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 3,036,527	$ 1,936,214
Short-term investments	225,000	1,766,000
Trade receivables, less allowance of $66,000 in 2015 and $49,000 in 2014	2,282,611	2,096,328
Inventories	2,278,361	2,630,650
Prepaid expenses and other assets	104,754	86,400
Income taxes receivable	172,750	163,651
Deferred income taxes	178,000	178,000
Total current assets	8,278,003	8,857,243
PROPERTY, PLANT, AND EQUIPMENT, at cost:
Land and building	6,394,357	6,247,781
Machinery and equipment	4,273,136	3,956,561
Office equipment	946,319	754,220
Vehicles	247,356	247,356
Construction in progress	1,110,433
Gross property, plant, and equipment, at cost	12,971,601	11,205,918
Less accumulated depreciation	(6,279,345)	(5,789,070)
Net property, plant, and equipment, at cost	6,692,256	5,416,848
INTANGIBLE ASSETS, less accumulated amortization of $117,749 in 2015 and $198,918 in 2014	330,806	353,871
Total assets	15,301,065	14,627,962
CURRENT LIABILITIES:
Accounts payable, trade	451,813	371,181
Accounts payable, construction	569,843
Accrued compensation	394,048	294,706
Other accrued liabilities	70,275	78,610
Total current liabilities	1,485,979	744,497
DEFERRED INCOME TAXES	545,000	545,000
Total liabilities	2,030,979	1,289,497
STOCKHOLDERS' EQUITY:
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	2,697,395	2,681,307
Retained earnings	10,370,866	10,455,333
Total stockholders' equity	13,270,086	13,338,465
Total liabilities and stockholders' equity	$ 15,301,065	$ 14,627,962