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Balance Sheets - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Current assets:    
Cash and cash equivalents $ 1,251,097 $ 1,875,655
Marketable securities 7,322,646 7,522,625
Accounts receivable, net of allowance for credit losses of $17,169 in 2025 and $14,342 in 2024 1,586,889 1,428,455
Inventories, net 1,507,763 1,451,995
Prepaid expenses and other current assets 207,839 207,804
Prepaid income taxes 325,163 179,017
Assets, Current 12,201,397 12,665,551
Deferred income taxes (net) 0 175,397
Property, plant, and equipment:    
Land 69,000 69,000
Factory equipment and fixtures 4,786,309 4,743,238
Building and improvements 3,352,276 3,336,352
Total property, plant, and equipment 8,207,585 8,148,590
Less: Accumulated depreciation 7,300,403 7,192,203
Total property, plant, and equipment, net 907,182 956,387
TOTAL ASSETS 13,108,579 13,797,335
Current liabilities    
Accounts payable 480,791 425,003
Accrued expenses 1,164,948 1,467,933
Deferred revenue 12,177 0
Dividends payable 11,405 21,533
Total current liabilities 1,669,321 1,914,469
Deferred income taxes, net 207,246 0
Total liabilities 1,876,567 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 December 31, 2025 and 2024 459,432 459,432
Retained earnings 10,772,580 11,423,434
Total stockholders’ equity 11,232,012 11,882,866
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY $ 13,108,579 $ 13,797,335