XML 42 R32.htm IDEA: XBRL DOCUMENT v3.21.2
Sales, Contract Assets and Contract Liabilities (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Revenue $ 0 $ 0 $ 363,000 $ 0  
Cost of goods sold 505,000 153,000 730,000 153,000  
Cost of sales for losses on two contracts 556,000   574,000 0  
Cost of goods sold before warranty adjustment 35,000   86,000    
Contract assets 108,000   108,000   $ 92,000
Contract liabilities 48,000   $ 48,000   $ 94,000
Year 2018          
Number of projects to expire product warranties     4    
Residual costs 16,000        
Year 2016 and 2017          
Number of projects to expire product warranties     6    
Residual costs     $ 8,000    
Burner Contract          
Revenue $ 0 $ 0 363,000 $ 0  
Cost of goods sold     250,000    
Cost of goods sold, warranty accrual     $ 36,000