XML 101 R44.htm IDEA: XBRL DOCUMENT v3.22.1
Revenue, Contract Assets and Contract Liabilities (Details)
$ in Thousands
 3 Months Ended 12 Months Ended 24 Months Ended
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
project
Dec. 31, 2020
USD ($)
Dec. 31, 2017
USD ($)
Revenues $ 54 $ 190 $ 363 $ 0 $ 0 $ 0 $ 0 $ 607 $ 0  
Cost of goods sold               1,059 279  
Cost of goods sold from the ExxonMobil project 712     450       712 450  
Reversal of accruals for product warranties that expired                   $ 171
Cost of goods sold, warranty adjustment               86    
Contract assets, current 39     92       39 92  
Contract liabilities $ 84     $ 94       84 $ 94  
Cost of goods sold, estimated loss upon completion               $ 433    
Year 2016 and 2017                    
Number of projects to expire product warranties | project               7