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Consolidated Balance Sheets - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 4,208,000 $ 6,205,000
Accounts receivable, less allowances of $7,000 421,000 92,000
Short-term investments (Note 2) 5,179,000 3,630,000
Inventories, less reserves for obsolescence of $5,152,000, and $5,141,000, respectively (Note 3) 2,949,000 2,597,000
Prepaid expenses and other current assets 122,000 283,000
Total current assets 12,879,000 12,807,000
Property and equipment, net 3,029,000 2,970,000
Deferred taxes 1,542,000 2,043,000
Other assets (Note 5) 186,000 186,000
Total assets 17,636,000 18,006,000
Current liabilities:    
Accounts payable 251,000 194,000
Accrued liabilities 822,000 969,000
Total current and total liabilities 1,073,000 1,163,000
Commitments and contingencies (Note 12)
Shareholders’ equity:    
Preferred stock, $0.001 par value. Authorized 5,000,000 shares; None issued or outstanding 0 0
Additional paid-in capital 11,484,000 11,474,000
Accumulated other comprehensive loss (49,000) (61,000)
Retained earnings 5,122,000 5,424,000
Total shareholders’ equity 16,563,000 16,843,000
Total liabilities and equity 17,636,000 18,006,000
Common Class A [Member]    
Shareholders’ equity:    
Common stock, value 5,000 5,000
Common Class B [Member]    
Shareholders’ equity:    
Common stock, value $ 1,000 $ 1,000