Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Revenues (Details) - Schedule of disaggregation of revenues

v3.20.4
Revenues (Details) - Schedule of disaggregation of revenues - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues $ 520,817 $ 636,080 $ 663,237
Product [Member]      
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues 339,782 430,746 456,504
Service [Member]      
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues 181,035 205,334 206,733
Total revenues recognized in point in time [Member]      
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues 380,187 474,631 587,477
Total revenues recognized in point in time [Member] | Product [Member]      
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues 339,782 430,746 456,504
Total revenues recognized in point in time [Member] | Service [Member]      
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues 40,405 43,885 130,973
Total revenues recognized over time [Member]      
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues 140,630 161,449 75,760
Total revenues recognized over time [Member] | Service [Member]      
Revenues (Details) - Schedule of disaggregation of revenues [Line Items]      
Total Revenues $ 140,630 $ 161,449 $ 75,760