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Segment Geographical Information and Major Customers (Details) - Schedule of reported segment results of operation - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
2018 |  |  |
Total revenues | $ 371,194 | $ 325,630 | $ 284,375
Expenses | 330,606 | 291,978 | 252,677
Segment operating income (loss) | 40,588 | 33,652 | 31,698
Depreciation and amortization | 13,939 | 14,025 | 12,564
Software Services [Member] |  |  |
2018 |  |  |
Total revenues | 86,025 | 86,140 | 81,332
Expenses | 64,498 | 71,825 | 63,902
Segment operating income (loss) | 21,527 | 14,315 | 17,430
Depreciation and amortization | 10,329 | 8,799 | 8,727
IT Professional Services [Member] |  |  |
2018 |  |  |
Total revenues | 285,169 | 239,490 | 203,043
Expenses | 258,907 | 216,842 | 183,985
Segment operating income (loss) | 26,262 | 22,648 | 19,058
Depreciation and amortization | 3,347 | 5,059 | 3,611
Unallocated Expenses [Member] |  |  |
2018 |  |  |
Total revenues |  |  |
Expenses | 7,201 | 3,311 | 4,790
Segment operating income (loss) | (7,201) | (3,311) | (4,790)
Depreciation and amortization | $ 263 | $ 167 | $ 226

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