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Line of Credit (Details) - USD ($)
$ in Millions
1 Months Ended 6 Months Ended
May 31, 2015
Jun. 30, 2020
Nov. 30, 2017
Line Of Credit Facility [Line Items]      
Revolving line of credit, maximum borrowing capacity   $ 20.0  
Base interest rate   3.25%  
Percentage spread on variable rate   0.25%  
Adjusted quick ratio   1.25  
Borrowing capacity     $ 15.5
LIBOR      
Line Of Credit Facility [Line Items]      
Revolving line of credit, basis spread over variable rate   3.00%  
Prime rate      
Line Of Credit Facility [Line Items]      
Revolving line of credit, basis spread over applicable rate on default   5.00%  
Revolving line of credit      
Line Of Credit Facility [Line Items]      
Bank guarantee to customer     $ 3.0
Letter of credit      
Line Of Credit Facility [Line Items]      
Amount drawn from revolving line of credit $ 1.5