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Details of Selected Balance Sheet Accounts Details of Selected Balance Sheet Accounts - Goodwill (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Goodwill          
Goodwill     $ 23,585 $ 22,915 $ 22,915
Impairment of goodwill $ 0 $ 0 (4,150) 0  
Impact of foreign currency translation adjustments     (1,406)   670
Goodwill $ 18,029   $ 18,029   23,585
Goodwill discount rate 19.00%   19.00%    
E&P Technology & Services          
Goodwill          
Goodwill     $ 2,943 2,943 2,943
Impairment of goodwill     0    
Impact of foreign currency translation adjustments     0   0
Goodwill $ 2,943   2,943   2,943
Optimization Software & Services          
Goodwill          
Goodwill     20,642 $ 19,972 19,972
Impairment of goodwill     (4,150)    
Impact of foreign currency translation adjustments     (1,406)   670
Goodwill $ 15,086   $ 15,086   $ 20,642