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Commitments And Contingencies (Narrative) (Details)
$ in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2019
USD ($)
Jan. 31, 2018
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2018
CAD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Loss Contingencies [Line Items]                
Rental expenses           $ 845 $ 884  
Preliminary tax assessment       $ 923 $ 1,218      
Maximum [Member] | U.S. Employee [Member]                
Loss Contingencies [Line Items]                
Interest and penalties     $ 300          
Minimum [Member] | U.S. Employee [Member]                
Loss Contingencies [Line Items]                
Accrual related to settlement     200     $ 200    
Interest and penalties     $ 200          
Trade Secrets Case [Member]                
Loss Contingencies [Line Items]                
Judgment awarded   $ 675            
Accrual related to settlement               $ 675
Net payments due to settlement with defendants $ 66