Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 1,768,481	$ 1,875,655
Marketable securities	6,652,644	7,522,625
Accounts receivable, net of allowance for credit losses of $21,628 at June 30, 2025 and $14,342 at December 31, 2024	1,907,494	1,428,455
Inventories, net	1,531,817	1,451,995
Prepaid expenses and other current assets	233,832	207,804
Prepaid income taxes	372,660	179,017
Total current assets	12,466,928	12,665,551
Deferred income taxes, net	0	175,397
Net property, plant, and equipment
Land	69,000	69,000
Factory equipment and fixtures	4,764,135	4,743,238
Building and improvements	3,336,676	3,336,352
Total property, plant, and equipment	8,169,811	8,148,590
Less: Accumulated depreciation	7,242,387	7,192,203
Total property, plant, and equipment, net	927,424	956,387
TOTAL ASSETS	13,394,352	13,797,335
Current liabilities
Accounts payable	415,608	425,003
Accrued expenses and other current liabilities	1,297,869	1,467,933
Deferred revenue	128,632	0
Dividends payable	11,362	21,533
Total current liabilities	1,853,471	1,914,469
Deferred income taxes, net	78,306	0
Total liabilities	1,931,777	1,914,469
Commitments and Contingencies
Stockholders' equity
Common stock $.10 par value; 10,000,000 shares authorized; 4,594,319 shares issued and outstanding at June 30, 2025 and December 31, 2024	459,432	459,432
Retained earnings	11,003,143	11,423,434
Total stockholders’ equity	11,462,575	11,882,866
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 13,394,352	$ 13,797,335