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Significant Customers and Contingencies (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Concentration Risk [Line Items]          
Accounts receivable $ 3,396,000   $ 3,396,000   $ 2,932,000
Supply Commitment [Member]          
Concentration Risk [Line Items]          
Minimum assets under supply agreeement $ 1,000,000   $ 1,000,000    
Equipment sale - net book value equipment 115.00%   115.00%    
Supply Commitment [Member] | less than          
Concentration Risk [Line Items]          
Earnings trigger under supply agreeement     $ 0    
Cash, cash equivalents and investments trigger under supply agreeement $ 1,000,000   1,000,000    
Supply Commitment [Member] | more than          
Concentration Risk [Line Items]          
Cash, cash equivalents and investments trigger under supply agreeement 500,000   500,000    
Accelerated debt maturity - principal amount debt 10,000,000   10,000,000    
Non-cash requirement $ 500,000   $ 500,000    
Equipment sale - original book value of equipment and upgrades 30.00%   30.00%    
Customer One [Member]          
Concentration Risk [Line Items]          
Accounts receivable $ 609,000 $ 366,000 $ 609,000 $ 366,000  
Customer Two [Member]          
Concentration Risk [Line Items]          
Accounts receivable 422,000 26,000 422,000 26,000  
Customer Three [Member]          
Concentration Risk [Line Items]          
Accounts receivable 1,048,000 479,000 1,048,000 479,000  
Customer Four [Member]          
Concentration Risk [Line Items]          
Accounts receivable 194,000 811,000 194,000 811,000  
Customer Five [Member]          
Concentration Risk [Line Items]          
Accounts receivable $ 106,000 $ 0 $ 106,000 $ 0  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer One [Member]          
Concentration Risk [Line Items]          
Revenue from customers 25.00% 32.00% 22.00% 39.00%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Two [Member]          
Concentration Risk [Line Items]          
Revenue from customers 17.00% 7.00% 17.00% 11.00%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Three [Member]          
Concentration Risk [Line Items]          
Revenue from customers 15.00% 13.00% 13.00% 14.00%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Four [Member]          
Concentration Risk [Line Items]          
Revenue from customers 10.00% 26.00% 13.00% 16.00%  
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Five [Member]          
Concentration Risk [Line Items]          
Revenue from customers 8.00% 0.00% 16.00% 0.00%