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The Company, Revenue Recognition (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Arrangement
Dec. 31, 2019
USD ($)
Revenue Recognition [Abstract]    
Number of types of arrangements | Arrangement 2  
Lease term 36 months  
Lease automatic renewal period 1 year  
Remaining performance obligations $ 115 $ 324
Short-term contract liabilities 108 209
Long-term contract liabilities 7 115
Contract liabilities recognized as revenue 209 155
Revenue reimbursements $ 485 779
Minimum [Member]    
Revenue Recognition [Abstract]    
Notice period to cancel contract agreement 30 days  
Maximum [Member]    
Revenue Recognition [Abstract]    
Notice period to cancel contract agreement 60 days  
South Korea [Member]    
Revenue Recognition [Abstract]    
Lease term 48 months  
International [Member]    
Revenue Recognition [Abstract]    
Remaining performance obligations $ 3,244  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01    
Revenue Recognition [Abstract]    
Remaining performance obligations   $ 209
Expected timing of satisfaction period   1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01    
Revenue Recognition [Abstract]    
Remaining performance obligations $ 108  
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | International [Member]    
Revenue Recognition [Abstract]    
Remaining performance obligations $ 948  
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01    
Revenue Recognition [Abstract]    
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | International [Member]    
Revenue Recognition [Abstract]    
Remaining performance obligations $ 954  
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01    
Revenue Recognition [Abstract]    
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | International [Member]    
Revenue Recognition [Abstract]    
Remaining performance obligations $ 867  
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01    
Revenue Recognition [Abstract]    
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | International [Member]    
Revenue Recognition [Abstract]    
Remaining performance obligations $ 440  
Expected timing of satisfaction period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | International [Member]    
Revenue Recognition [Abstract]    
Remaining performance obligations $ 35  
Expected timing of satisfaction period 1 year