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Condensed Consolidated Balance Sheets (unaudited) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Current assets:    
Cash and cash equivalents $ 1,682,919 $ 1,922,679
Short-term investments 0 247,276
Accounts receivable - less allowances of $197,114 and $197,536 4,849,224 3,094,911
Contract assets 10,460 48,811
Inventories, net 6,349,195 6,496,170
Assets held for sale 0 348,400
Income taxes receivable 48,231 1,378
Other current assets 597,482 431,440
Total current assets 13,537,511 12,591,065
Property, plant and equipment, net 10,049,017 10,735,139
Operating lease right-of-use asset, net 397,752  
Deposits with vendors 43,970 43,970
Total assets 24,028,250 23,370,174
Current liabilities:    
Accounts payable 1,036,043 1,233,147
Accrued wages and salaries 681,814 436,417
Other accrued expenses 304,105 284,497
Unearned revenue and customer deposits 140,958 265,789
Current portion of operating lease liability 102,811  
Total current liabilities 2,265,731 2,219,850
Note payable 500,000  
Deferred income taxes, net 237,872 237,872
Operating lease liability 345,533  
Other long-term liabilities 660,000 880,000
Total liabilities 4,009,136 3,337,722
Commitments and contingencies (Note 3)
Shareholders' Equity    
Preferred stock, no par value, 500,000 shares authorized: none outstanding
Common stock, $1.00 par value, 4,000,000 shares authorized, 1,138,096 shares issued; 966,132 shares outstanding as of September 30, 2025 and December 31, 2024 1,138,096 1,138,096
Additional paid-in capital 447,134 447,134
Retained earnings 22,355,982 22,369,320
Treasury stock, 171,964 shares at cost (3,922,098) (3,922,098)
Total shareholders' equity 20,019,114 20,032,452
Total liabilities and shareholders' equity $ 24,028,250 $ 23,370,174