Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.21.2
Basis of Presentation (Details) - customer
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Sales of Engineering Services          
Number of customers     2    
Total revenues [Member]          
Number of customers 2   1    
Accounts Receivable [Member]          
Number of customers     3   2
One customer | Sales of Engineering Services          
Number of customers   1      
One customer | Total revenues [Member]          
Number of customers   1   1  
One customer | Total revenues [Member] | Customer Concentration Risk          
Concentration Risk, Percentage 12.00% 10.00% 10.00% 10.00%  
One customer | Total revenues [Member] | Sales of Engineering Services | Customer Concentration Risk          
Concentration Risk, Percentage   90.00%      
One customer | Accounts Receivable [Member] | Customer Concentration Risk          
Concentration Risk, Percentage     29.00%   21.00%
Two customers | Sales of Engineering Services          
Number of customers       2  
Two customers | Total revenues [Member] | Customer Concentration Risk          
Concentration Risk, Percentage 10.00%        
Two customers | Total revenues [Member] | Sales of Engineering Services | Customer Concentration Risk          
Concentration Risk, Percentage     100.00% 90.00%  
Two customers | Accounts Receivable [Member] | Customer Concentration Risk          
Concentration Risk, Percentage     15.00%   14.00%
Three Customers | Accounts Receivable [Member] | Customer Concentration Risk          
Concentration Risk, Percentage     14.00%