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Consolidated Statements of Shareholders’ Equity Statement - USD ($) $ in Thousands | Total | Ordinary shares | Deferred Shares | Deferred B shares | Deferred C Shares | Common shares Ordinary shares | Common shares Deferred Shares | Common shares Deferred B shares | Common shares Deferred C Shares | Additional Paid in Capital | Accumulated other comprehensive loss | Accumulated deficit
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Sep. 30, 2016 | $ 30,687 |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 63,513 | $ (4,651) | $ (28,175)
Beginning balance (shares) at Sep. 30, 2016 |  |  |  |  |  | 13,921,544 | 0 | 0 | 0 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Unrealized loss on foreign currency translation | 802 |  |  |  |  |  |  |  |  |  |  |
Net loss | (19,727) |  |  |  |  |  |  |  |  |  |  |
Ending, balance at Sep. 30, 2017 | $ 142,601 |  |  |  |  | $ 1 | $ 0 | $ 0 | $ 0 | 194,351 | (3,849) | (47,902)
Ending balance (shares) at Sep. 30, 2017 | 29,962,741 |  |  |  |  | 29,962,742 | 0 | 0 | 0 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares, net of issuance costs | $ 156,803 |  |  |  |  | $ 1 |  | $ 118 |  | 156,802 |  |
Issuance, net of issuance cost (shares) |  |  |  |  |  | 10,183,440 | 34,425 | 88,893,548 | 1 |  |  |
Share-based compensation expense | 6,765 |  |  |  |  |  |  |  |  | 6,765 |  |
Unrealized loss on foreign currency translation | (6,071) |  |  |  |  |  |  |  |  |  | (6,071) |
Net loss | (44,751) |  |  |  |  |  |  |  |  |  |  | (44,751)
Ending, balance at Sep. 30, 2018 | $ 255,465 |  |  |  |  | $ 2 | $ 0 | $ 118 | $ 0 | 357,918 | (9,920) | (92,653)
Ending balance (shares) at Sep. 30, 2018 | 129,074,156 | 40,146,182 | 34,425 | 88,893,548 | 1 | 40,146,182 | 34,425 | 88,893,548 | 1 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares, net of issuance costs | $ 3,393 |  |  |  |  |  |  |  |  | 3,393 |  |
Restricted shares - forfeited (shares) |  |  |  |  |  | (565) |  |  |  |  |  |
Unrealized loss on foreign currency translation | (5,568) |  |  |  |  |  |  |  |  |  | (5,568) |
Net loss | (20,648) |  |  |  |  |  |  |  |  |  |  | (20,648)
Ending, balance at Dec. 31, 2018 | $ 232,642 |  |  |  |  | $ 2 | $ 0 | $ 118 | $ 0 | 361,311 | (15,488) | (113,301)
Ending balance (shares) at Dec. 31, 2018 | 129,073,591 | 40,145,617 | 34,425 | 88,893,548 | 1 | 40,145,617 | 34,425 | 88,893,548 | 1 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares, net of issuance costs | $ 108,815 |  |  |  |  |  |  |  |  | 108,815 |  |
Issuance, net of issuance cost (shares) |  |  |  |  |  | 4,830,000 |  |  |  |  |  |
Share-based compensation expense | 30,386 |  |  |  |  |  |  |  |  | 30,386 |  |
Restricted shares - forfeited (shares) |  |  |  |  |  | (4,335) |  |  |  |  |  |
Exercise of stock options | $ 48 |  |  |  |  |  |  |  |  | 48 |  |
Exercise of stock options (shares) | 11,724 |  |  |  |  | 11,724 |  |  |  |  |  |
Unrealized loss on foreign currency translation | $ 6,797 |  |  |  |  |  |  |  |  |  |  |
Net loss | (123,849) |  |  |  |  |  |  |  |  |  |  | (123,849)
Ending, balance at Dec. 31, 2019 | $ 254,839 |  |  |  |  | $ 2 | $ 0 | $ 118 | $ 0 | $ 500,560 | $ (8,691) | $ (237,150)
Ending balance (shares) at Dec. 31, 2019 | 133,910,980 | 44,983,006 | 34,425 | 88,893,548 | 1 | 44,983,006 | 34,425 | 88,893,548 | 1 |  |  |

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