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Significant Customers and Contingencies (Details Narrative)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
Number
Mar. 31, 2020
USD ($)
Number
Dec. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
Number of major customers | Number 5 5    
Accounts receivable $ 3,828      
Finished goods inventory 1,148   $ 1,545  
Customer One [Member]        
Accounts receivable 837 $ 0    
Cash, cash equivalents and investments trigger under supply agreeement      
Customer Two [Member]        
Accounts receivable 812 896    
Cash, cash equivalents and investments trigger under supply agreeement      
Customer Three [Member]        
Accounts receivable 476 31    
Cash, cash equivalents and investments trigger under supply agreeement      
Customer Four [Member]        
Accounts receivable 855 180    
Cash, cash equivalents and investments trigger under supply agreeement      
Customer Five [Member]        
Accounts receivable $ 390 $ 593    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer One [Member]        
Revenue from customers 24.00% 0.00%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Two [Member]        
Revenue from customers 20.00% 46.00%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Three [Member]        
Revenue from customers 17.00% 15.00%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Four [Member]        
Revenue from customers 15.00% 4.00%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer Five [Member]        
Revenue from customers 10.00% 15.00%    
BASF [Member]        
Equipment sale - net book value equipment 115.00%      
BASF [Member] | Less than [Member]        
Earnings trigger under supply agreeement $ 0      
Cash, cash equivalents and investments trigger under supply agreeement 500      
BASF [Member] | Greater than [Member]        
Cash, cash equivalents and investments trigger under supply agreeement       $ 1,000
Accelerated debt maturity - principal amount debt $ 10,000      
Finished goods inventory       $ 500
Equipment sale - original book value of equipment and upgrades 30.00%