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Significant Customers and Contingencies (Detail Narratives)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Number
Mar. 31, 2018
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Number of major customers | Number 3      
Accounts receivable $ 2,105      
Finished goods inventory 1,057     $ 1,243
Customer Concentration Risk [Member] | Revenue Benchmark [Member]        
Revenue from customers   74.00%    
Customers One [Member]        
Accounts receivable $ 631 $ 1,089    
Customers One [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]        
Revenue from customers 54.00% 78.00%    
Customers Two [Member]        
Accounts receivable $ 673 $ 0    
Customers Two [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]        
Revenue from customers 19.00% 0.00%    
Customers Three [Member]        
Accounts receivable $ 325 $ 0    
Customers Three [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]        
Revenue from customers 9.00% 0.00%    
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]        
Earnings trigger under supply agreeement $ 0      
Cash, cash equivalents and investments trigger under supply agreeement       $ 500