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v3.20.2

Shareholders' (Deficit) / Equity - Reconciliation of the Company's Beginning and Ending Balances in Shareholders' (Deficit) / Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Equity [Abstract] |  |  |  |  |
Shareholders' equity (deficit), Beginning Balance |  |  | $ (26,238) | $ 71,622 | $ 71,622
Exercise of share options |  |  |  | 59 |
Share-based compensation expense |  |  | 1,783 | 1,113 |
Issuance of ordinary shares, net |  |  | 2,564 |  |
Issuance of warrants |  |  | 1,723 |  |
Net loss | $ (12,521) | $ (27,638) | (28,621) | (48,218) | (103,130)
Shareholders' equity (deficit), Ending Balance | $ (48,789) | $ 24,576 | $ (48,789) | $ 24,576 | $ (26,238)

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