Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Additional Information (Details)

v3.19.3.a.u2
Revenue Recognition - Additional Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]    
Deferred revenue $ 3,281 $ 2,597
Non-cancellable backlog 524  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01    
Revenue from Contract with Customer [Abstract]    
Remaining performance obligation, amount $ 1,303  
Disaggregation of Revenue [Line Items]    
Remaining performance obligation, period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01    
Revenue from Contract with Customer [Abstract]    
Remaining performance obligation, amount $ 906  
Disaggregation of Revenue [Line Items]    
Remaining performance obligation, period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01    
Revenue from Contract with Customer [Abstract]    
Remaining performance obligation, amount $ 1,049  
Disaggregation of Revenue [Line Items]    
Remaining performance obligation, period