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Significant Customers and Contingencies (Detail Narratives) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Mar. 31, 2019
Accounts receivable $ 970 $ 829    
Finished goods inventory $ 1,170 1,243    
BASF [Member]        
Equipment sale - original book value of equipment and upgrades 30.00%      
Equipment sale - net book value equipment 115.00%      
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
BASF [Member] | Less than [Member]        
Cash, cash equivalents and investments trigger under supply agreeement 500      
Customers One [Member]        
Accounts receivable 449 316    
Customers Two [Member]        
Accounts receivable $ 16 $ 74    
Customer Concentration Risk [Member] | Revenue Benchmark [Member]        
Revenue from customers 63.00%      
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customers One [Member]        
Revenue from customers 63.00% 74.00%    
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customers Two [Member]        
Revenue from customers 8.00% 7.00%