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 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Product Information [Line Items]        
Net loss $ 2,142,000 $ 1,113,000    
Net cash used in operations 989,000 1,156,000    
Cash 212,000   $ 549,000  
Borrowing capacity      
Stockholders equity 11,047,000 17,068,000 13,189,000 $ 18,181,000
Working capital 9,668,000      
Net sales 1,775,000 $ 4,190,000    
Inventory write down 0   0  
Warranty reserve accrual $ 600,000   $ 600,000 $ 600,000
Sales to Telecommunications Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 71.00% 95.00%    
Sales To International Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 6.00% 27.00%    
Largest Customer One [Member] | Sales to Telecommunications Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 49.00% 49.00%    
Largest Customer Two [Member] | Accounts Payable [Member] | Customer Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 9.00%   10.00%  
Largest Customer Two [Member] | Sales to Telecommunications Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 25.00% 27.00%    
Largest Receivable Accounts One [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 70.00%   69.00%  
Largest Receivable Accounts Two [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 10.00%   16.00%  
Largest Vendors One [Member] | Accounts Payable [Member] | Supplier Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 37.00%   30.00%  
Largest Customer Three [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]        
Product Information [Line Items]        
Concentration risk 5.00%   5.00%  
International Sales [Member]        
Product Information [Line Items]        
Net sales $ 99,000 $ 1,125,000