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NOTE 1 — Organization and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]  
Activities in allowance for doubtful accounts
             
Year  Balance at
Beginning of Year
  Charged to
Costs and
Expenses
  Amounts
Written Off
  Balance at
End of
Year
             
 2024   $40,651   $     $     $40,651 
 2023   $40,651   $     $     $40,651 
Inventory Components
                
   December 31,
   2024  2023
Raw materials and sub-assemblies  $5,716,202   $5,839,176 
Finished goods   221,241    500,814 
Inventory reserves   (995,943)   (930,943)
Inventory, net  $4,941,500  $5,409,047
Prepaid Expenses and Other Current Assets
                
   December 31,
   2024  2023
Prepaid insurance  $73,008   $75,626 
Product certification costs   102,716    75,604 
Prepaid inventory purchases   113,340    123,736 
Prepaid maintenance contracts and other prepaid expenses   141,655    165,764 
Prepaid expenses and other current assets  $430,719  $440,730
Estimated future amortization of intangible assets
      
Fiscal Year  Amount
2025    127,296
2026    127,296
2027    127,296
2028    127,296
2029    127,296
Thereafter     795,593
    $1,432,073
Customers who accounted for at least 10% of the Company's accounts receivable balances
                
   December 31,
   2024  2023
Bluestar, Inc.   32%   * 
ScanSource, Inc.   19%   13%
Ingram Micro Inc.   15%   20%
Synnex Corporation   *    14%
Nippon Primex, Inc.   *    11%
* Customer accounted for less than 10% of the Company’s accounts receivable balances
Warranty
             
Year  Balance at
Beginning of Year
  Additional Warranty Reserves  Amounts
Charged to Reserves
  Balance at
End of
Year
             
 2024   $78,871   $10,038   $(10,038)  $78,871 
 2023   $78,871   $13,417   $(13,417)  $78,871 
Revenues for geographic areas (in $'000)
                
   Years Ended December 31,
Revenues: (in thousands)  2024  2023
   United States  $13,863   $12,539 
   Europe   2,318    2,426 
   Asia and rest of world   2,582    2,069 
   Total  $18,763  $17,034
Customers who accounted for at least 10% of total revenues
                
   Years Ended December 31,
   2024  2023
BlueStar, Inc.   32%   22%
Ingram Micro Inc.   16%   22%
ScanSource, Inc.   *    14%
*Customer accounted for less than 10% of total revenues