BALANCE SHEETS - USD ($)	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 929,700	$ 1,048,713
Short-term investments	2,895,000	3,246,000
Trade receivables, less allowances of $53,000 in 2017 and $54,000 in 2016	2,190,260	2,336,501
Inventories	2,086,065	1,986,172
Prepaid expenses and other assets	168,242	361,905
Income taxes receivable	2,116	66,181
Total current assets	8,271,383	9,045,472
PROPERTY, PLANT, AND EQUIPMENT, at cost:
Land and building	9,207,790	9,189,743
Machinery and equipment	4,968,595	4,884,814
Office equipment	1,573,191	1,566,856
Vehicles	245,679	272,144
Gross property, plant, and equipment, at cost	15,995,255	15,913,557
Less accumulated depreciation	(7,693,594)	(7,001,162)
Total property, plant, and equipment, at cost	8,301,661	8,912,395
INTANGIBLE ASSETS, less accumulated amortization of $174,991 in 2017 and $149,072 in 2016	351,186	338,127
Total assets	16,924,230	18,295,994
CURRENT LIABILITIES:
Current portion of long-term debt, net	130,899	127,303
Accounts payable	321,860	730,386
Accrued compensation	360,554	388,600
Other accrued liabilities	62,468	67,088
Total current liabilities	875,781	1,313,377
LONG-TERM LIABILITIES
Long-term debt, less current portion, net	2,946,518	3,077,457
Deferred income taxes	144,000	446,000
Total long-term liabilities	3,090,518	3,523,457
Total liabilities	3,966,299	4,836,834
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Preferred stock, par value $.10 per share; authorized 250,000 shares: none issued
Common stock, par value $.10 per share; authorized 4,750,000 shares; issued and outstanding 1,983,553 shares in 2017 and 2,018,753 shares in 2016	198,355	201,875
Additional paid-in capital	2,709,390	2,732,006
Retained earnings	10,050,186	10,525,279
Total stockholders' equity	12,957,931	13,459,160
Total liabilities and stockholders' equity	$ 16,924,230	$ 18,295,994