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Revenues are attributable to countries based on the location of the Company's customers: (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues $ 5,685 $ 4,051 $ 14,813 $ 14,138
UNITED STATES        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues $ 5,685 $ 4,051 $ 14,813 $ 14,138