Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies (Details Narrative)

v3.20.2
Organization and Summary of Significant Accounting Policies (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 24, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Net sales   99.00%   97.00%   95.00%  
Cash   $ 2,071   $ 2,071      
Proceeds from Paycheck Protection Program loan       1,715    
Proceeds from sales of common shares and warrants       2,812    
Proceeds from exercise of warrants $ 861     861    
Inventory reserves           $ 600  
Excess inventory   2,400   2,400      
Inventories, net   11,380   11,380   13,912  
Warranty reserve   $ 375   $ 375   $ 375 $ 175
Largest Vendor [Member] | Accounts Payable [Member]              
Concentration risk       14.00%      
Largest Vendors One [Member] | Accounts Payable [Member]              
Concentration risk       11.00%      
Largest Vendors Two [Member] | Accounts Payable [Member]              
Concentration risk       10.00%   10.00%  
Largest Vendors One [Member] | Accounts Payable [Member]              
Concentration risk           11.00%  
Revenue [Member] | Sales to Telecommunications Customers [Member]              
Concentration risk   99.00% 97.00% 96.00% 96.00%    
Revenue [Member] | Sales to Telecommunications Customers [Member] | Largest Customer One [Member]              
Concentration risk   41.00% 84.00% 57.00% 84.00%    
Revenue [Member] | Sales to Telecommunications Customers [Member] | Largest Customer Two [Member]              
Concentration risk   27.00% 7.50% 13.00% 24.00%    
Accounts Receivable [Member] | Largest Customer One [Member]              
Concentration risk       58.00%   70.00%  
Accounts Receivable [Member] | Largest Customer Two [Member]              
Concentration risk       29.00%   20.00%  
Australia [Member]              
Cash   $ 11   $ 11   $ 17  
Romania, New Leu [Member]              
Cash   $ 29   $ 29   $ 4