Annual report pursuant to Section 13 and 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 ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Product Information [Line Items]      
Net loss $ 1,414 $ 10,871  
Net cash used in operating activities 9,380 6,548  
Cash and cash equivalents 5,101 1,646  
Line of credit 2,943    
Stockholders equity 23,250 11,491 $ 18,376
Working capital 21,760    
Net sales 16,896 9,031  
Warranty reserve accrual 600 600 $ 375
Cumulative inventory write-downs 0 3,400  
Research and development cost $ 1,986 $ 1,723  
Sales to Telecommunications Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk 89.00% 96.00%  
Largest Customer One [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk 74.00% 87.00%  
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 67.00% 52.00%  
Largest Customer Two [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk 15.00%    
Largest Customer Two [Member] | Accounts Payable [Member] | Customer Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk 9.00% 9.00%  
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   15.00%  
Largest Customer Three [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk 9.00% 8.00%  
Largest Customer Three [Member] | Sales to Telecommunications Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk   14.00%  
Largest Vendors One [Member] | Accounts Payable [Member] | Supplier Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk 16.00% 10.00%  
International Sales [Member]      
Product Information [Line Items]      
Net sales $ 1,279 $ 1,522  
AUSTRALIA      
Product Information [Line Items]      
Cash 9 10  
RON [Member]      
Product Information [Line Items]      
Cash $ 23 $ 28  
Non-US [Member] | Sales to Telecommunications Customers [Member] | Revenue from Contract with Customer Benchmark [Member] | Revenue from Rights Concentration Risk [Member]      
Product Information [Line Items]      
Concentration risk 8.00% 17.00%