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Share Capital - Schedule of Non-cash Share-Based Compensation Expenses Related to Company's Equity-Based Awards (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total share-based compensation expense | $ 14,338 | $ 10,479 | $ 37,719 | $ 29,205 | $ 39,846
Cost of revenues |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total share-based compensation expense | 605 | 464 | 1,626 | 891 | 1,261
Research, development and clinical trials |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total share-based compensation expense | 2,202 | 1,223 | 5,203 | 3,415 | 4,709
Sales and marketing |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total share-based compensation expense | 3,368 | 1,979 | 8,585 | 5,309 | 7,393
General and administrative |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Total share-based compensation expense | $ 8,163 | $ 6,813 | $ 22,305 | $ 19,590 | $ 26,483

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