Quarterly report pursuant to Section 13 or 15(d)

ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)

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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2022
Product Information [Line Items]                
Net Income (Loss) Attributable to Parent $ (501,000) $ 436,000 $ 1,641,000 $ 1,549,000        
Cash 1,119,000   1,119,000   $ 549,000      
Borrowing capacity            
Stockholders equity 11,548,000 16,632,000 11,548,000 16,632,000 13,189,000 $ 11,047,000 $ 17,068,000 $ 18,181,000
Working capital 10,153,000   10,153,000          
Net sales 4,660,000 $ 5,587,000 6,434,000 $ 9,777,000        
Inventory write down 0   0   0      
Warranty reserve accrual $ 600,000   $ 600,000   $ 600,000     $ 600,000
Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member] | Largest Customer One [Member]                
Product Information [Line Items]                
Concentration risk 40.00% 49.00% 42.00% 49.00%        
Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member] | Largest Customer Two [Member]                
Product Information [Line Items]                
Concentration risk 27.00% 26.00% 20.00% 26.00%        
Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member] | Largest Customer Three [Member]                
Product Information [Line Items]                
Concentration risk 22.00%   16.00%          
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Largest Receivable Accounts One [Member]                
Product Information [Line Items]                
Concentration risk     80.00%   69.00%      
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Largest Receivable Accounts Two [Member]                
Product Information [Line Items]                
Concentration risk     12.00%   16.00%      
Accounts Payable [Member] | Customer Concentration Risk [Member] | Largest Vendors Two [Member]                
Product Information [Line Items]                
Concentration risk     7.00%   10.00%      
Accounts Payable [Member] | Customer Concentration Risk [Member] | Largest Vendors Three [Member]                
Product Information [Line Items]                
Concentration risk     5.00%   5.00%      
Accounts Payable [Member] | Supplier Concentration Risk [Member] | Largest Vendors One [Member]                
Product Information [Line Items]                
Concentration risk     48.00%   30.00%      
Sales to Telecommunications Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member]                
Product Information [Line Items]                
Concentration risk 95.00% 97.00% 89.00% 96.00%        
Sales To International Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member]                
Product Information [Line Items]                
Concentration risk 25.00% 29.00% 20.00% 28.00%        
International Sales [Member]                
Product Information [Line Items]                
Net sales $ 1,170,000 $ 1,641,000 $ 1,269,000 $ 2,766,000