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STOCK-BASED COMPENSATION - Stock-Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | $ 7,368 | $ 9,013
Restricted Stock Units (RSUs) |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | 5,900 | 5,600
Performance Based Awards and Long Term Performance based Units |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | 1,000 | 3,000
Employee Stock Purchase Plan |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | 500 | 400
Cost of revenues |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | 301 | 320
Research and development |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | 2,668 | 3,055
Sales and marketing |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | 1,653 | 1,948
General and administrative |  |
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations: |  |
Stock-based compensation expense | $ 2,746 | $ 3,690

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